File indexing completed on 2024-05-12 17:26:02

 <?php
 /////////////////////////////////////////////////////////////////
 /// getID3() by James Heinrich <info@getid3.org>               //
 //  available at http://getid3.sourceforge.net                 //
 //            or http://www.getid3.org                         //
 //          also https://github.com/JamesHeinrich/getID3       //
 /////////////////////////////////////////////////////////////////
 // See readme.txt for more details                             //
 /////////////////////////////////////////////////////////////////
 ///                                                            //
 // write.id3v2.php                                             //
 // module for writing ID3v2 tags                               //
 // dependencies: module.tag.id3v2.php                          //
 //                                                            ///
 /////////////////////////////////////////////////////////////////
 
 getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.tag.id3v2.php', __FILE__, true);
 
 class getid3_write_id3v2
 {
   public $filename;
   public $tag_data;
   public $fread_buffer_size           = 32768;    // read buffer size in bytes
   public $paddedlength                = 4096;     // minimum length of ID3v2 tag in bytes
   public $majorversion                = 3;        // ID3v2 major version (2, 3 (recommended), 4)
   public $minorversion                = 0;        // ID3v2 minor version - always 0
   public $merge_existing_data         = false;    // if true, merge new data with existing tags; if false, delete old tag data and only write new tags
   public $id3v2_default_encodingid    = 0;        // default text encoding (ISO-8859-1) if not explicitly passed
   public $id3v2_use_unsynchronisation = false;    // the specs say it should be TRUE, but most other ID3v2-aware programs are broken if unsynchronization is used, so by default don't use it.
   public $warnings                    = array();  // any non-critical errors will be stored here
   public $errors                      = array();  // any critical errors will be stored here
 
   public function getid3_write_id3v2() {
     return true;
   }
 
   public function WriteID3v2() {
     // File MUST be writeable - CHMOD(646) at least. It's best if the
     // directory is also writeable, because that method is both faster and less susceptible to errors.
 
     if (!empty($this->filename) && (is_writeable($this->filename) || (!file_exists($this->filename) && is_writeable(dirname($this->filename))))) {
       // Initialize getID3 engine
       $getID3 = new getID3;
       $OldThisFileInfo = $getID3->analyze($this->filename);
       if (!getid3_lib::intValueSupported($OldThisFileInfo['filesize'])) {
         $this->errors[] = 'Unable to write ID3v2 because file is larger than '.round(PHP_INT_MAX / 1073741824).'GB';
         fclose($fp_source);
         return false;
       }
       if ($this->merge_existing_data) {
         // merge with existing data
         if (!empty($OldThisFileInfo['id3v2'])) {
           $this->tag_data = $this->array_join_merge($OldThisFileInfo['id3v2'], $this->tag_data);
         }
       }
       $this->paddedlength = (isset($OldThisFileInfo['id3v2']['headerlength']) ? max($OldThisFileInfo['id3v2']['headerlength'], $this->paddedlength) : $this->paddedlength);
 
       if ($NewID3v2Tag = $this->GenerateID3v2Tag()) {
 
         if (file_exists($this->filename) && is_writeable($this->filename) && isset($OldThisFileInfo['id3v2']['headerlength']) && ($OldThisFileInfo['id3v2']['headerlength'] == strlen($NewID3v2Tag))) {
 
           // best and fastest method - insert-overwrite existing tag (padded to length of old tag if neccesary)
           if (file_exists($this->filename)) {
 
             if (is_readable($this->filename) && is_writable($this->filename) && is_file($this->filename) && ($fp = fopen($this->filename, 'r+b'))) {
               rewind($fp);
               fwrite($fp, $NewID3v2Tag, strlen($NewID3v2Tag));
               fclose($fp);
             } else {
               $this->errors[] = 'Could not fopen("'.$this->filename.'", "r+b")';
             }
 
           } else {
 
             if (is_writable($this->filename) && is_file($this->filename) && ($fp = fopen($this->filename, 'wb'))) {
               rewind($fp);
               fwrite($fp, $NewID3v2Tag, strlen($NewID3v2Tag));
               fclose($fp);
             } else {
               $this->errors[] = 'Could not fopen("'.$this->filename.'", "wb")';
             }
 
           }
 
         } else {
 
           if ($tempfilename = tempnam(GETID3_TEMP_DIR, 'getID3')) {
             if (is_readable($this->filename) && is_file($this->filename) && ($fp_source = fopen($this->filename, 'rb'))) {
               if (is_writable($tempfilename) && is_file($tempfilename) && ($fp_temp = fopen($tempfilename, 'wb'))) {
 
                 fwrite($fp_temp, $NewID3v2Tag, strlen($NewID3v2Tag));
 
                 rewind($fp_source);
                 if (!empty($OldThisFileInfo['avdataoffset'])) {
                   fseek($fp_source, $OldThisFileInfo['avdataoffset']);
                 }
 
                 while ($buffer = fread($fp_source, $this->fread_buffer_size)) {
                   fwrite($fp_temp, $buffer, strlen($buffer));
                 }
 
                 fclose($fp_temp);
                 fclose($fp_source);
                 copy($tempfilename, $this->filename);
                 unlink($tempfilename);
                 return true;
 
               } else {
                 $this->errors[] = 'Could not fopen("'.$tempfilename.'", "wb")';
               }
               fclose($fp_source);
 
             } else {
               $this->errors[] = 'Could not fopen("'.$this->filename.'", "rb")';
             }
           }
           return false;
 
         }
 
       } else {
 
         $this->errors[] = '$this->GenerateID3v2Tag() failed';
 
       }
 
       if (!empty($this->errors)) {
         return false;
       }
       return true;
     } else {
       $this->errors[] = 'WriteID3v2() failed: !is_writeable('.$this->filename.')';
     }
     return false;
   }
 
   public function RemoveID3v2() {
     // File MUST be writeable - CHMOD(646) at least. It's best if the
     // directory is also writeable, because that method is both faster and less susceptible to errors.
     if (is_writeable(dirname($this->filename))) {
 
       // preferred method - only one copying operation, minimal chance of corrupting
       // original file if script is interrupted, but required directory to be writeable
       if (is_readable($this->filename) && is_file($this->filename) && ($fp_source = fopen($this->filename, 'rb'))) {
 
         // Initialize getID3 engine
         $getID3 = new getID3;
         $OldThisFileInfo = $getID3->analyze($this->filename);
         if (!getid3_lib::intValueSupported($OldThisFileInfo['filesize'])) {
           $this->errors[] = 'Unable to remove ID3v2 because file is larger than '.round(PHP_INT_MAX / 1073741824).'GB';
           fclose($fp_source);
           return false;
         }
         rewind($fp_source);
         if ($OldThisFileInfo['avdataoffset'] !== false) {
           fseek($fp_source, $OldThisFileInfo['avdataoffset']);
         }
         if (is_writable($this->filename) && is_file($this->filename) && ($fp_temp = fopen($this->filename.'getid3tmp', 'w+b'))) {
           while ($buffer = fread($fp_source, $this->fread_buffer_size)) {
             fwrite($fp_temp, $buffer, strlen($buffer));
           }
           fclose($fp_temp);
         } else {
           $this->errors[] = 'Could not fopen("'.$this->filename.'getid3tmp", "w+b")';
         }
         fclose($fp_source);
       } else {
         $this->errors[] = 'Could not fopen("'.$this->filename.'", "rb")';
       }
       if (file_exists($this->filename)) {
         unlink($this->filename);
       }
       rename($this->filename.'getid3tmp', $this->filename);
 
     } elseif (is_writable($this->filename)) {
 
       // less desirable alternate method - double-copies the file, overwrites original file
       // and could corrupt source file if the script is interrupted or an error occurs.
       if (is_readable($this->filename) && is_file($this->filename) && ($fp_source = fopen($this->filename, 'rb'))) {
 
         // Initialize getID3 engine
         $getID3 = new getID3;
         $OldThisFileInfo = $getID3->analyze($this->filename);
         if (!getid3_lib::intValueSupported($OldThisFileInfo['filesize'])) {
           $this->errors[] = 'Unable to remove ID3v2 because file is larger than '.round(PHP_INT_MAX / 1073741824).'GB';
           fclose($fp_source);
           return false;
         }
         rewind($fp_source);
         if ($OldThisFileInfo['avdataoffset'] !== false) {
           fseek($fp_source, $OldThisFileInfo['avdataoffset']);
         }
         if ($fp_temp = tmpfile()) {
           while ($buffer = fread($fp_source, $this->fread_buffer_size)) {
             fwrite($fp_temp, $buffer, strlen($buffer));
           }
           fclose($fp_source);
           if (is_writable($this->filename) && is_file($this->filename) && ($fp_source = fopen($this->filename, 'wb'))) {
             rewind($fp_temp);
             while ($buffer = fread($fp_temp, $this->fread_buffer_size)) {
               fwrite($fp_source, $buffer, strlen($buffer));
             }
             fseek($fp_temp, -128, SEEK_END);
             fclose($fp_source);
           } else {
             $this->errors[] = 'Could not fopen("'.$this->filename.'", "wb")';
           }
           fclose($fp_temp);
         } else {
           $this->errors[] = 'Could not create tmpfile()';
         }
       } else {
         $this->errors[] = 'Could not fopen("'.$this->filename.'", "rb")';
       }
 
     } else {
 
       $this->errors[] = 'Directory and file both not writeable';
 
     }
 
     if (!empty($this->errors)) {
       return false;
     }
     return true;
   }
 
 
   public function GenerateID3v2TagFlags($flags) {
     switch ($this->majorversion) {
       case 4:
         // %abcd0000
         $flag  = (!empty($flags['unsynchronisation']) ? '1' : '0'); // a - Unsynchronisation
         $flag .= (!empty($flags['extendedheader']   ) ? '1' : '0'); // b - Extended header
         $flag .= (!empty($flags['experimental']     ) ? '1' : '0'); // c - Experimental indicator
         $flag .= (!empty($flags['footer']           ) ? '1' : '0'); // d - Footer present
         $flag .= '0000';
         break;
 
       case 3:
         // %abc00000
         $flag  = (!empty($flags['unsynchronisation']) ? '1' : '0'); // a - Unsynchronisation
         $flag .= (!empty($flags['extendedheader']   ) ? '1' : '0'); // b - Extended header
         $flag .= (!empty($flags['experimental']     ) ? '1' : '0'); // c - Experimental indicator
         $flag .= '00000';
         break;
 
       case 2:
         // %ab000000
         $flag  = (!empty($flags['unsynchronisation']) ? '1' : '0'); // a - Unsynchronisation
         $flag .= (!empty($flags['compression']      ) ? '1' : '0'); // b - Compression
         $flag .= '000000';
         break;
 
       default:
         return false;
         break;
     }
     return chr(bindec($flag));
   }
 
 
   public function GenerateID3v2FrameFlags($TagAlter=false, $FileAlter=false, $ReadOnly=false, $Compression=false, $Encryption=false, $GroupingIdentity=false, $Unsynchronisation=false, $DataLengthIndicator=false) {
     switch ($this->majorversion) {
       case 4:
         // %0abc0000 %0h00kmnp
         $flag1  = '0';
         $flag1 .= $TagAlter  ? '1' : '0'; // a - Tag alter preservation (true == discard)
         $flag1 .= $FileAlter ? '1' : '0'; // b - File alter preservation (true == discard)
         $flag1 .= $ReadOnly  ? '1' : '0'; // c - Read only (true == read only)
         $flag1 .= '0000';
 
         $flag2  = '0';
         $flag2 .= $GroupingIdentity    ? '1' : '0'; // h - Grouping identity (true == contains group information)
         $flag2 .= '00';
         $flag2 .= $Compression         ? '1' : '0'; // k - Compression (true == compressed)
         $flag2 .= $Encryption          ? '1' : '0'; // m - Encryption (true == encrypted)
         $flag2 .= $Unsynchronisation   ? '1' : '0'; // n - Unsynchronisation (true == unsynchronised)
         $flag2 .= $DataLengthIndicator ? '1' : '0'; // p - Data length indicator (true == data length indicator added)
         break;
 
       case 3:
         // %abc00000 %ijk00000
         $flag1  = $TagAlter  ? '1' : '0';  // a - Tag alter preservation (true == discard)
         $flag1 .= $FileAlter ? '1' : '0';  // b - File alter preservation (true == discard)
         $flag1 .= $ReadOnly  ? '1' : '0';  // c - Read only (true == read only)
         $flag1 .= '00000';
 
         $flag2  = $Compression      ? '1' : '0';      // i - Compression (true == compressed)
         $flag2 .= $Encryption       ? '1' : '0';      // j - Encryption (true == encrypted)
         $flag2 .= $GroupingIdentity ? '1' : '0';      // k - Grouping identity (true == contains group information)
         $flag2 .= '00000';
         break;
 
       default:
         return false;
         break;
 
     }
     return chr(bindec($flag1)).chr(bindec($flag2));
   }
 
   public function GenerateID3v2FrameData($frame_name, $source_data_array) {
     if (!getid3_id3v2::IsValidID3v2FrameName($frame_name, $this->majorversion)) {
       return false;
     }
     $framedata = '';
 
     if (($this->majorversion < 3) || ($this->majorversion > 4)) {
 
       $this->errors[] = 'Only ID3v2.3 and ID3v2.4 are supported in GenerateID3v2FrameData()';
 
     } else { // $this->majorversion 3 or 4
 
       switch ($frame_name) {
         case 'UFID':
           // 4.1   UFID Unique file identifier
           // Owner identifier        <text string> $00
           // Identifier              <up to 64 bytes binary data>
           if (strlen($source_data_array['data']) > 64) {
             $this->errors[] = 'Identifier not allowed to be longer than 64 bytes in '.$frame_name.' (supplied data was '.strlen($source_data_array['data']).' bytes long)';
           } else {
             $framedata .= str_replace("\x00", '', $source_data_array['ownerid'])."\x00";
             $framedata .= substr($source_data_array['data'], 0, 64); // max 64 bytes - truncate anything longer
           }
           break;
 
         case 'TXXX':
           // 4.2.2 TXXX User defined text information frame
           // Text encoding     $xx
           // Description       <text string according to encoding> $00 (00)
           // Value             <text string according to encoding>
           $source_data_array['encodingid'] = (isset($source_data_array['encodingid']) ? $source_data_array['encodingid'] : $this->id3v2_default_encodingid);
           if (!$this->ID3v2IsValidTextEncoding($source_data_array['encodingid'], $this->majorversion)) {
             $this->errors[] = 'Invalid Text Encoding in '.$frame_name.' ('.$source_data_array['encodingid'].') for ID3v2.'.$this->majorversion;
           } else {
             $framedata .= chr($source_data_array['encodingid']);
             $framedata .= $source_data_array['description'].getid3_id3v2::TextEncodingTerminatorLookup($source_data_array['encodingid']);
             $framedata .= $source_data_array['data'];
           }
           break;
 
         case 'WXXX':
           // 4.3.2 WXXX User defined URL link frame
           // Text encoding     $xx
           // Description       <text string according to encoding> $00 (00)
           // URL               <text string>
           $source_data_array['encodingid'] = (isset($source_data_array['encodingid']) ? $source_data_array['encodingid'] : $this->id3v2_default_encodingid);
           if (!$this->ID3v2IsValidTextEncoding($source_data_array['encodingid'], $this->majorversion)) {
             $this->errors[] = 'Invalid Text Encoding in '.$frame_name.' ('.$source_data_array['encodingid'].') for ID3v2.'.$this->majorversion;
           } elseif (!isset($source_data_array['data']) || !$this->IsValidURL($source_data_array['data'], false, false)) {
             //$this->errors[] = 'Invalid URL in '.$frame_name.' ('.$source_data_array['data'].')';
             // probably should be an error, need to rewrite IsValidURL() to handle other encodings
             $this->warnings[] = 'Invalid URL in '.$frame_name.' ('.$source_data_array['data'].')';
           } else {
             $framedata .= chr($source_data_array['encodingid']);
             $framedata .= $source_data_array['description'].getid3_id3v2::TextEncodingTerminatorLookup($source_data_array['encodingid']);
             $framedata .= $source_data_array['data'];
           }
           break;
 
         case 'IPLS':
           // 4.4  IPLS Involved people list (ID3v2.3 only)
           // Text encoding     $xx
           // People list strings    <textstrings>
           $source_data_array['encodingid'] = (isset($source_data_array['encodingid']) ? $source_data_array['encodingid'] : $this->id3v2_default_encodingid);
           if (!$this->ID3v2IsValidTextEncoding($source_data_array['encodingid'], $this->majorversion)) {
             $this->errors[] = 'Invalid Text Encoding in '.$frame_name.' ('.$source_data_array['encodingid'].') for ID3v2.'.$this->majorversion;
           } else {
             $framedata .= chr($source_data_array['encodingid']);
             $framedata .= $source_data_array['data'];
           }
           break;
 
         case 'MCDI':
           // 4.4   MCDI Music CD identifier
           // CD TOC                <binary data>
           $framedata .= $source_data_array['data'];
           break;
 
         case 'ETCO':
           // 4.5   ETCO Event timing codes
           // Time stamp format    $xx
           //   Where time stamp format is:
           // $01  (32-bit value) MPEG frames from beginning of file
           // $02  (32-bit value) milliseconds from beginning of file
           //   Followed by a list of key events in the following format:
           // Type of event   $xx
           // Time stamp      $xx (xx ...)
           //   The 'Time stamp' is set to zero if directly at the beginning of the sound
           //   or after the previous event. All events MUST be sorted in chronological order.
           if (($source_data_array['timestampformat'] > 2) || ($source_data_array['timestampformat'] < 1)) {
             $this->errors[] = 'Invalid Time Stamp Format byte in '.$frame_name.' ('.$source_data_array['timestampformat'].')';
           } else {
             $framedata .= chr($source_data_array['timestampformat']);
             foreach ($source_data_array as $key => $val) {
               if (!$this->ID3v2IsValidETCOevent($val['typeid'])) {
                 $this->errors[] = 'Invalid Event Type byte in '.$frame_name.' ('.$val['typeid'].')';
               } elseif (($key != 'timestampformat') && ($key != 'flags')) {
                 if (($val['timestamp'] > 0) && ($previousETCOtimestamp >= $val['timestamp'])) {
                   //   The 'Time stamp' is set to zero if directly at the beginning of the sound
                   //   or after the previous event. All events MUST be sorted in chronological order.
                   $this->errors[] = 'Out-of-order timestamp in '.$frame_name.' ('.$val['timestamp'].') for Event Type ('.$val['typeid'].')';
                 } else {
                   $framedata .= chr($val['typeid']);
                   $framedata .= getid3_lib::BigEndian2String($val['timestamp'], 4, false);
                 }
               }
             }
           }
           break;
 
         case 'MLLT':
           // 4.6   MLLT MPEG location lookup table
           // MPEG frames between reference  $xx xx
           // Bytes between reference        $xx xx xx
           // Milliseconds between reference $xx xx xx
           // Bits for bytes deviation       $xx
           // Bits for milliseconds dev.     $xx
           //   Then for every reference the following data is included;
           // Deviation in bytes         %xxx....
           // Deviation in milliseconds  %xxx....
           if (($source_data_array['framesbetweenreferences'] > 0) && ($source_data_array['framesbetweenreferences'] <= 65535)) {
             $framedata .= getid3_lib::BigEndian2String($source_data_array['framesbetweenreferences'], 2, false);
           } else {
             $this->errors[] = 'Invalid MPEG Frames Between References in '.$frame_name.' ('.$source_data_array['framesbetweenreferences'].')';
           }
           if (($source_data_array['bytesbetweenreferences'] > 0) && ($source_data_array['bytesbetweenreferences'] <= 16777215)) {
             $framedata .= getid3_lib::BigEndian2String($source_data_array['bytesbetweenreferences'], 3, false);
           } else {
             $this->errors[] = 'Invalid bytes Between References in '.$frame_name.' ('.$source_data_array['bytesbetweenreferences'].')';
           }
           if (($source_data_array['msbetweenreferences'] > 0) && ($source_data_array['msbetweenreferences'] <= 16777215)) {
             $framedata .= getid3_lib::BigEndian2String($source_data_array['msbetweenreferences'], 3, false);
           } else {
             $this->errors[] = 'Invalid Milliseconds Between References in '.$frame_name.' ('.$source_data_array['msbetweenreferences'].')';
           }
           if (!$this->IsWithinBitRange($source_data_array['bitsforbytesdeviation'], 8, false)) {
             if (($source_data_array['bitsforbytesdeviation'] % 4) == 0) {
               $framedata .= chr($source_data_array['bitsforbytesdeviation']);
             } else {
               $this->errors[] = 'Bits For Bytes Deviation in '.$frame_name.' ('.$source_data_array['bitsforbytesdeviation'].') must be a multiple of 4.';
             }
           } else {
             $this->errors[] = 'Invalid Bits For Bytes Deviation in '.$frame_name.' ('.$source_data_array['bitsforbytesdeviation'].')';
           }
           if (!$this->IsWithinBitRange($source_data_array['bitsformsdeviation'], 8, false)) {
             if (($source_data_array['bitsformsdeviation'] % 4) == 0) {
               $framedata .= chr($source_data_array['bitsformsdeviation']);
             } else {
               $this->errors[] = 'Bits For Milliseconds Deviation in '.$frame_name.' ('.$source_data_array['bitsforbytesdeviation'].') must be a multiple of 4.';
             }
           } else {
             $this->errors[] = 'Invalid Bits For Milliseconds Deviation in '.$frame_name.' ('.$source_data_array['bitsformsdeviation'].')';
           }
           foreach ($source_data_array as $key => $val) {
             if (($key != 'framesbetweenreferences') && ($key != 'bytesbetweenreferences') && ($key != 'msbetweenreferences') && ($key != 'bitsforbytesdeviation') && ($key != 'bitsformsdeviation') && ($key != 'flags')) {
               $unwrittenbitstream .= str_pad(getid3_lib::Dec2Bin($val['bytedeviation']), $source_data_array['bitsforbytesdeviation'], '0', STR_PAD_LEFT);
               $unwrittenbitstream .= str_pad(getid3_lib::Dec2Bin($val['msdeviation']),   $source_data_array['bitsformsdeviation'],    '0', STR_PAD_LEFT);
             }
           }
           for ($i = 0; $i < strlen($unwrittenbitstream); $i += 8) {
             $highnibble = bindec(substr($unwrittenbitstream, $i, 4)) << 4;
             $lownibble  = bindec(substr($unwrittenbitstream, $i + 4, 4));
             $framedata .= chr($highnibble & $lownibble);
           }
           break;
 
         case 'SYTC':
           // 4.7   SYTC Synchronised tempo codes
           // Time stamp format   $xx
           // Tempo data          <binary data>
           //   Where time stamp format is:
           // $01  (32-bit value) MPEG frames from beginning of file
           // $02  (32-bit value) milliseconds from beginning of file
           if (($source_data_array['timestampformat'] > 2) || ($source_data_array['timestampformat'] < 1)) {
             $this->errors[] = 'Invalid Time Stamp Format byte in '.$frame_name.' ('.$source_data_array['timestampformat'].')';
           } else {
             $framedata .= chr($source_data_array['timestampformat']);
             foreach ($source_data_array as $key => $val) {
               if (!$this->ID3v2IsValidETCOevent($val['typeid'])) {
                 $this->errors[] = 'Invalid Event Type byte in '.$frame_name.' ('.$val['typeid'].')';
               } elseif (($key != 'timestampformat') && ($key != 'flags')) {
                 if (($val['tempo'] < 0) || ($val['tempo'] > 510)) {
                   $this->errors[] = 'Invalid Tempo (max = 510) in '.$frame_name.' ('.$val['tempo'].') at timestamp ('.$val['timestamp'].')';
                 } else {
                   if ($val['tempo'] > 255) {
                     $framedata .= chr(255);
                     $val['tempo'] -= 255;
                   }
                   $framedata .= chr($val['tempo']);
                   $framedata .= getid3_lib::BigEndian2String($val['timestamp'], 4, false);
                 }
               }
             }
           }
           break;
 
         case 'USLT':
           // 4.8   USLT Unsynchronised lyric/text transcription
           // Text encoding        $xx
           // Language             $xx xx xx
           // Content descriptor   <text string according to encoding> $00 (00)
           // Lyrics/text          <full text string according to encoding>
           $source_data_array['encodingid'] = (isset($source_data_array['encodingid']) ? $source_data_array['encodingid'] : $this->id3v2_default_encodingid);
           if (!$this->ID3v2IsValidTextEncoding($source_data_array['encodingid'])) {
             $this->errors[] = 'Invalid Text Encoding in '.$frame_name.' ('.$source_data_array['encodingid'].') for ID3v2.'.$this->majorversion;
           } elseif (getid3_id3v2::LanguageLookup($source_data_array['language'], true) == '') {
             $this->errors[] = 'Invalid Language in '.$frame_name.' ('.$source_data_array['language'].')';
           } else {
             $framedata .= chr($source_data_array['encodingid']);
             $framedata .= strtolower($source_data_array['language']);
             $framedata .= $source_data_array['description'].getid3_id3v2::TextEncodingTerminatorLookup($source_data_array['encodingid']);
             $framedata .= $source_data_array['data'];
           }
           break;
 
         case 'SYLT':
           // 4.9   SYLT Synchronised lyric/text
           // Text encoding        $xx
           // Language             $xx xx xx
           // Time stamp format    $xx
           //   $01  (32-bit value) MPEG frames from beginning of file
           //   $02  (32-bit value) milliseconds from beginning of file
           // Content type         $xx
           // Content descriptor   <text string according to encoding> $00 (00)
           //   Terminated text to be synced (typically a syllable)
           //   Sync identifier (terminator to above string)   $00 (00)
           //   Time stamp                                     $xx (xx ...)
           $source_data_array['encodingid'] = (isset($source_data_array['encodingid']) ? $source_data_array['encodingid'] : $this->id3v2_default_encodingid);
           if (!$this->ID3v2IsValidTextEncoding($source_data_array['encodingid'])) {
             $this->errors[] = 'Invalid Text Encoding in '.$frame_name.' ('.$source_data_array['encodingid'].') for ID3v2.'.$this->majorversion;
           } elseif (getid3_id3v2::LanguageLookup($source_data_array['language'], true) == '') {
             $this->errors[] = 'Invalid Language in '.$frame_name.' ('.$source_data_array['language'].')';
           } elseif (($source_data_array['timestampformat'] > 2) || ($source_data_array['timestampformat'] < 1)) {
             $this->errors[] = 'Invalid Time Stamp Format byte in '.$frame_name.' ('.$source_data_array['timestampformat'].')';
           } elseif (!$this->ID3v2IsValidSYLTtype($source_data_array['contenttypeid'])) {
             $this->errors[] = 'Invalid Content Type byte in '.$frame_name.' ('.$source_data_array['contenttypeid'].')';
           } elseif (!is_array($source_data_array['data'])) {
             $this->errors[] = 'Invalid Lyric/Timestamp data in '.$frame_name.' (must be an array)';
           } else {
             $framedata .= chr($source_data_array['encodingid']);
             $framedata .= strtolower($source_data_array['language']);
             $framedata .= chr($source_data_array['timestampformat']);
             $framedata .= chr($source_data_array['contenttypeid']);
             $framedata .= $source_data_array['description'].getid3_id3v2::TextEncodingTerminatorLookup($source_data_array['encodingid']);
             ksort($source_data_array['data']);
             foreach ($source_data_array['data'] as $key => $val) {
               $framedata .= $val['data'].getid3_id3v2::TextEncodingTerminatorLookup($source_data_array['encodingid']);
               $framedata .= getid3_lib::BigEndian2String($val['timestamp'], 4, false);
             }
           }
           break;
 
         case 'COMM':
           // 4.10  COMM Comments
           // Text encoding          $xx
           // Language               $xx xx xx
           // Short content descrip. <text string according to encoding> $00 (00)
           // The actual text        <full text string according to encoding>
           $source_data_array['encodingid'] = (isset($source_data_array['encodingid']) ? $source_data_array['encodingid'] : $this->id3v2_default_encodingid);
           if (!$this->ID3v2IsValidTextEncoding($source_data_array['encodingid'])) {
             $this->errors[] = 'Invalid Text Encoding in '.$frame_name.' ('.$source_data_array['encodingid'].') for ID3v2.'.$this->majorversion;
           } elseif (getid3_id3v2::LanguageLookup($source_data_array['language'], true) == '') {
             $this->errors[] = 'Invalid Language in '.$frame_name.' ('.$source_data_array['language'].')';
           } else {
             $framedata .= chr($source_data_array['encodingid']);
             $framedata .= strtolower($source_data_array['language']);
             $framedata .= $source_data_array['description'].getid3_id3v2::TextEncodingTerminatorLookup($source_data_array['encodingid']);
             $framedata .= $source_data_array['data'];
           }
           break;
 
         case 'RVA2':
           // 4.11  RVA2 Relative volume adjustment (2) (ID3v2.4+ only)
           // Identification          <text string> $00
           //   The 'identification' string is used to identify the situation and/or
           //   device where this adjustment should apply. The following is then
           //   repeated for every channel:
           // Type of channel         $xx
           // Volume adjustment       $xx xx
           // Bits representing peak  $xx
           // Peak volume             $xx (xx ...)
           $framedata .= str_replace("\x00", '', $source_data_array['description'])."\x00";
           foreach ($source_data_array as $key => $val) {
             if ($key != 'description') {
               $framedata .= chr($val['channeltypeid']);
               $framedata .= getid3_lib::BigEndian2String($val['volumeadjust'], 2, false, true); // signed 16-bit
               if (!$this->IsWithinBitRange($source_data_array['bitspeakvolume'], 8, false)) {
                 $framedata .= chr($val['bitspeakvolume']);
                 if ($val['bitspeakvolume'] > 0) {
                   $framedata .= getid3_lib::BigEndian2String($val['peakvolume'], ceil($val['bitspeakvolume'] / 8), false, false);
                 }
               } else {
                 $this->errors[] = 'Invalid Bits Representing Peak Volume in '.$frame_name.' ('.$val['bitspeakvolume'].') (range = 0 to 255)';
               }
             }
           }
           break;
 
         case 'RVAD':
           // 4.12  RVAD Relative volume adjustment (ID3v2.3 only)
           // Increment/decrement     %00fedcba
           // Bits used for volume descr.        $xx
           // Relative volume change, right      $xx xx (xx ...) // a
           // Relative volume change, left       $xx xx (xx ...) // b
           // Peak volume right                  $xx xx (xx ...)
           // Peak volume left                   $xx xx (xx ...)
           // Relative volume change, right back $xx xx (xx ...) // c
           // Relative volume change, left back  $xx xx (xx ...) // d
           // Peak volume right back             $xx xx (xx ...)
           // Peak volume left back              $xx xx (xx ...)
           // Relative volume change, center     $xx xx (xx ...) // e
           // Peak volume center                 $xx xx (xx ...)
           // Relative volume change, bass       $xx xx (xx ...) // f
           // Peak volume bass                   $xx xx (xx ...)
           if (!$this->IsWithinBitRange($source_data_array['bitsvolume'], 8, false)) {
             $this->errors[] = 'Invalid Bits For Volume Description byte in '.$frame_name.' ('.$source_data_array['bitsvolume'].') (range = 1 to 255)';
           } else {
             $incdecflag .= '00';
             $incdecflag .= $source_data_array['incdec']['right']     ? '1' : '0';     // a - Relative volume change, right
             $incdecflag .= $source_data_array['incdec']['left']      ? '1' : '0';      // b - Relative volume change, left
             $incdecflag .= $source_data_array['incdec']['rightrear'] ? '1' : '0'; // c - Relative volume change, right back
             $incdecflag .= $source_data_array['incdec']['leftrear']  ? '1' : '0';  // d - Relative volume change, left back
             $incdecflag .= $source_data_array['incdec']['center']    ? '1' : '0';    // e - Relative volume change, center
             $incdecflag .= $source_data_array['incdec']['bass']      ? '1' : '0';      // f - Relative volume change, bass
             $framedata .= chr(bindec($incdecflag));
             $framedata .= chr($source_data_array['bitsvolume']);
             $framedata .= getid3_lib::BigEndian2String($source_data_array['volumechange']['right'], ceil($source_data_array['bitsvolume'] / 8), false);
             $framedata .= getid3_lib::BigEndian2String($source_data_array['volumechange']['left'],  ceil($source_data_array['bitsvolume'] / 8), false);
             $framedata .= getid3_lib::BigEndian2String($source_data_array['peakvolume']['right'], ceil($source_data_array['bitsvolume'] / 8), false);
             $framedata .= getid3_lib::BigEndian2String($source_data_array['peakvolume']['left'],  ceil($source_data_array['bitsvolume'] / 8), false);
             if ($source_data_array['volumechange']['rightrear'] || $source_data_array['volumechange']['leftrear'] ||
               $source_data_array['peakvolume']['rightrear'] || $source_data_array['peakvolume']['leftrear'] ||
               $source_data_array['volumechange']['center'] || $source_data_array['peakvolume']['center'] ||
               $source_data_array['volumechange']['bass'] || $source_data_array['peakvolume']['bass']) {
                 $framedata .= getid3_lib::BigEndian2String($source_data_array['volumechange']['rightrear'], ceil($source_data_array['bitsvolume']/8), false);
                 $framedata .= getid3_lib::BigEndian2String($source_data_array['volumechange']['leftrear'],  ceil($source_data_array['bitsvolume']/8), false);
                 $framedata .= getid3_lib::BigEndian2String($source_data_array['peakvolume']['rightrear'], ceil($source_data_array['bitsvolume']/8), false);
                 $framedata .= getid3_lib::BigEndian2String($source_data_array['peakvolume']['leftrear'],  ceil($source_data_array['bitsvolume']/8), false);
             }
             if ($source_data_array['volumechange']['center'] || $source_data_array['peakvolume']['center'] ||
               $source_data_array['volumechange']['bass'] || $source_data_array['peakvolume']['bass']) {
                 $framedata .= getid3_lib::BigEndian2String($source_data_array['volumechange']['center'], ceil($source_data_array['bitsvolume']/8), false);
                 $framedata .= getid3_lib::BigEndian2String($source_data_array['peakvolume']['center'], ceil($source_data_array['bitsvolume']/8), false);
             }
             if ($source_data_array['volumechange']['bass'] || $source_data_array['peakvolume']['bass']) {
                 $framedata .= getid3_lib::BigEndian2String($source_data_array['volumechange']['bass'], ceil($source_data_array['bitsvolume']/8), false);
                 $framedata .= getid3_lib::BigEndian2String($source_data_array['peakvolume']['bass'], ceil($source_data_array['bitsvolume']/8), false);
             }
           }
           break;
 
         case 'EQU2':
           // 4.12  EQU2 Equalisation (2) (ID3v2.4+ only)
           // Interpolation method  $xx
           //   $00  Band
           //   $01  Linear
           // Identification        <text string> $00
           //   The following is then repeated for every adjustment point
           // Frequency          $xx xx
           // Volume adjustment  $xx xx
           if (($source_data_array['interpolationmethod'] < 0) || ($source_data_array['interpolationmethod'] > 1)) {
             $this->errors[] = 'Invalid Interpolation Method byte in '.$frame_name.' ('.$source_data_array['interpolationmethod'].') (valid = 0 or 1)';
           } else {
             $framedata .= chr($source_data_array['interpolationmethod']);
             $framedata .= str_replace("\x00", '', $source_data_array['description'])."\x00";
             foreach ($source_data_array['data'] as $key => $val) {
               $framedata .= getid3_lib::BigEndian2String(intval(round($key * 2)), 2, false);
               $framedata .= getid3_lib::BigEndian2String($val, 2, false, true); // signed 16-bit
             }
           }
           break;
 
         case 'EQUA':
           // 4.12  EQUA Equalisation (ID3v2.3 only)
           // Adjustment bits    $xx
           //   This is followed by 2 bytes + ('adjustment bits' rounded up to the
           //   nearest byte) for every equalisation band in the following format,
           //   giving a frequency range of 0 - 32767Hz:
           // Increment/decrement   %x (MSB of the Frequency)
           // Frequency             (lower 15 bits)
           // Adjustment            $xx (xx ...)
           if (!$this->IsWithinBitRange($source_data_array['bitsvolume'], 8, false)) {
             $this->errors[] = 'Invalid Adjustment Bits byte in '.$frame_name.' ('.$source_data_array['bitsvolume'].') (range = 1 to 255)';
           } else {
             $framedata .= chr($source_data_array['adjustmentbits']);
             foreach ($source_data_array as $key => $val) {
               if ($key != 'bitsvolume') {
                 if (($key > 32767) || ($key < 0)) {
                   $this->errors[] = 'Invalid Frequency in '.$frame_name.' ('.$key.') (range = 0 to 32767)';
                 } else {
                   if ($val >= 0) {
                     // put MSB of frequency to 1 if increment, 0 if decrement
                     $key |= 0x8000;
                   }
                   $framedata .= getid3_lib::BigEndian2String($key, 2, false);
                   $framedata .= getid3_lib::BigEndian2String($val, ceil($source_data_array['adjustmentbits'] / 8), false);
                 }
               }
             }
           }
           break;
 
         case 'RVRB':
           // 4.13  RVRB Reverb
           // Reverb left (ms)                 $xx xx
           // Reverb right (ms)                $xx xx
           // Reverb bounces, left             $xx
           // Reverb bounces, right            $xx
           // Reverb feedback, left to left    $xx
           // Reverb feedback, left to right   $xx
           // Reverb feedback, right to right  $xx
           // Reverb feedback, right to left   $xx
           // Premix left to right             $xx
           // Premix right to left             $xx
           if (!$this->IsWithinBitRange($source_data_array['left'], 16, false)) {
             $this->errors[] = 'Invalid Reverb Left in '.$frame_name.' ('.$source_data_array['left'].') (range = 0 to 65535)';
           } elseif (!$this->IsWithinBitRange($source_data_array['right'], 16, false)) {
             $this->errors[] = 'Invalid Reverb Left in '.$frame_name.' ('.$source_data_array['right'].') (range = 0 to 65535)';
           } elseif (!$this->IsWithinBitRange($source_data_array['bouncesL'], 8, false)) {
             $this->errors[] = 'Invalid Reverb Bounces, Left in '.$frame_name.' ('.$source_data_array['bouncesL'].') (range = 0 to 255)';
           } elseif (!$this->IsWithinBitRange($source_data_array['bouncesR'], 8, false)) {
             $this->errors[] = 'Invalid Reverb Bounces, Right in '.$frame_name.' ('.$source_data_array['bouncesR'].') (range = 0 to 255)';
           } elseif (!$this->IsWithinBitRange($source_data_array['feedbackLL'], 8, false)) {
             $this->errors[] = 'Invalid Reverb Feedback, Left-To-Left in '.$frame_name.' ('.$source_data_array['feedbackLL'].') (range = 0 to 255)';
           } elseif (!$this->IsWithinBitRange($source_data_array['feedbackLR'], 8, false)) {
             $this->errors[] = 'Invalid Reverb Feedback, Left-To-Right in '.$frame_name.' ('.$source_data_array['feedbackLR'].') (range = 0 to 255)';
           } elseif (!$this->IsWithinBitRange($source_data_array['feedbackRR'], 8, false)) {
             $this->errors[] = 'Invalid Reverb Feedback, Right-To-Right in '.$frame_name.' ('.$source_data_array['feedbackRR'].') (range = 0 to 255)';
           } elseif (!$this->IsWithinBitRange($source_data_array['feedbackRL'], 8, false)) {
             $this->errors[] = 'Invalid Reverb Feedback, Right-To-Left in '.$frame_name.' ('.$source_data_array['feedbackRL'].') (range = 0 to 255)';
           } elseif (!$this->IsWithinBitRange($source_data_array['premixLR'], 8, false)) {
             $this->errors[] = 'Invalid Premix, Left-To-Right in '.$frame_name.' ('.$source_data_array['premixLR'].') (range = 0 to 255)';
           } elseif (!$this->IsWithinBitRange($source_data_array['premixRL'], 8, false)) {
             $this->errors[] = 'Invalid Premix, Right-To-Left in '.$frame_name.' ('.$source_data_array['premixRL'].') (range = 0 to 255)';
           } else {
             $framedata .= getid3_lib::BigEndian2String($source_data_array['left'], 2, false);
             $framedata .= getid3_lib::BigEndian2String($source_data_array['right'], 2, false);
             $framedata .= chr($source_data_array['bouncesL']);
             $framedata .= chr($source_data_array['bouncesR']);
             $framedata .= chr($source_data_array['feedbackLL']);
             $framedata .= chr($source_data_array['feedbackLR']);
             $framedata .= chr($source_data_array['feedbackRR']);
             $framedata .= chr($source_data_array['feedbackRL']);
             $framedata .= chr($source_data_array['premixLR']);
             $framedata .= chr($source_data_array['premixRL']);
           }
           break;
 
         case 'APIC':
           // 4.14  APIC Attached picture
           // Text encoding      $xx
           // MIME type          <text string> $00
           // Picture type       $xx
           // Description        <text string according to encoding> $00 (00)
           // Picture data       <binary data>
           $source_data_array['encodingid'] = (isset($source_data_array['encodingid']) ? $source_data_array['encodingid'] : $this->id3v2_default_encodingid);
           if (!$this->ID3v2IsValidTextEncoding($source_data_array['encodingid'])) {
             $this->errors[] = 'Invalid Text Encoding in '.$frame_name.' ('.$source_data_array['encodingid'].') for ID3v2.'.$this->majorversion;
           } elseif (!$this->ID3v2IsValidAPICpicturetype($source_data_array['picturetypeid'])) {
             $this->errors[] = 'Invalid Picture Type byte in '.$frame_name.' ('.$source_data_array['picturetypeid'].') for ID3v2.'.$this->majorversion;
           } elseif (($this->majorversion >= 3) && (!$this->ID3v2IsValidAPICimageformat($source_data_array['mime']))) {
             $this->errors[] = 'Invalid MIME Type in '.$frame_name.' ('.$source_data_array['mime'].') for ID3v2.'.$this->majorversion;
           } elseif (($source_data_array['mime'] == '-->') && (!$this->IsValidURL($source_data_array['data'], false, false))) {
             //$this->errors[] = 'Invalid URL in '.$frame_name.' ('.$source_data_array['data'].')';
             // probably should be an error, need to rewrite IsValidURL() to handle other encodings
             $this->warnings[] = 'Invalid URL in '.$frame_name.' ('.$source_data_array['data'].')';
           } else {
             $framedata .= chr($source_data_array['encodingid']);
             $framedata .= str_replace("\x00", '', $source_data_array['mime'])."\x00";
             $framedata .= chr($source_data_array['picturetypeid']);
             $framedata .= (!empty($source_data_array['description']) ? $source_data_array['description'] : '').getid3_id3v2::TextEncodingTerminatorLookup($source_data_array['encodingid']);
             $framedata .= $source_data_array['data'];
           }
           break;
 
         case 'GEOB':
           // 4.15  GEOB General encapsulated object
           // Text encoding          $xx
           // MIME type              <text string> $00
           // Filename               <text string according to encoding> $00 (00)
           // Content description    <text string according to encoding> $00 (00)
           // Encapsulated object    <binary data>
           $source_data_array['encodingid'] = (isset($source_data_array['encodingid']) ? $source_data_array['encodingid'] : $this->id3v2_default_encodingid);
           if (!$this->ID3v2IsValidTextEncoding($source_data_array['encodingid'])) {
             $this->errors[] = 'Invalid Text Encoding in '.$frame_name.' ('.$source_data_array['encodingid'].') for ID3v2.'.$this->majorversion;
           } elseif (!$this->IsValidMIMEstring($source_data_array['mime'])) {
             $this->errors[] = 'Invalid MIME Type in '.$frame_name.' ('.$source_data_array['mime'].')';
           } elseif (!$source_data_array['description']) {
             $this->errors[] = 'Missing Description in '.$frame_name;
           } else {
             $framedata .= chr($source_data_array['encodingid']);
             $framedata .= str_replace("\x00", '', $source_data_array['mime'])."\x00";
             $framedata .= $source_data_array['filename'].getid3_id3v2::TextEncodingTerminatorLookup($source_data_array['encodingid']);
             $framedata .= $source_data_array['description'].getid3_id3v2::TextEncodingTerminatorLookup($source_data_array['encodingid']);
             $framedata .= $source_data_array['data'];
           }
           break;
 
         case 'PCNT':
           // 4.16  PCNT Play counter
           //   When the counter reaches all one's, one byte is inserted in
           //   front of the counter thus making the counter eight bits bigger
           // Counter        $xx xx xx xx (xx ...)
           $framedata .= getid3_lib::BigEndian2String($source_data_array['data'], 4, false);
           break;
 
         case 'POPM':
           // 4.17  POPM Popularimeter
           //   When the counter reaches all one's, one byte is inserted in
           //   front of the counter thus making the counter eight bits bigger
           // Email to user   <text string> $00
           // Rating          $xx
           // Counter         $xx xx xx xx (xx ...)
           if (!$this->IsWithinBitRange($source_data_array['rating'], 8, false)) {
             $this->errors[] = 'Invalid Rating byte in '.$frame_name.' ('.$source_data_array['rating'].') (range = 0 to 255)';
           } elseif (!IsValidEmail($source_data_array['email'])) {
             $this->errors[] = 'Invalid Email in '.$frame_name.' ('.$source_data_array['email'].')';
           } else {
             $framedata .= str_replace("\x00", '', $source_data_array['email'])."\x00";
             $framedata .= chr($source_data_array['rating']);
             $framedata .= getid3_lib::BigEndian2String($source_data_array['data'], 4, false);
           }
           break;
 
         case 'RBUF':
           // 4.18  RBUF Recommended buffer size
           // Buffer size               $xx xx xx
           // Embedded info flag        %0000000x
           // Offset to next tag        $xx xx xx xx
           if (!$this->IsWithinBitRange($source_data_array['buffersize'], 24, false)) {
             $this->errors[] = 'Invalid Buffer Size in '.$frame_name;
           } elseif (!$this->IsWithinBitRange($source_data_array['nexttagoffset'], 32, false)) {
             $this->errors[] = 'Invalid Offset To Next Tag in '.$frame_name;
           } else {
             $framedata .= getid3_lib::BigEndian2String($source_data_array['buffersize'], 3, false);
             $flag .= '0000000';
             $flag .= $source_data_array['flags']['embededinfo'] ? '1' : '0';
             $framedata .= chr(bindec($flag));
             $framedata .= getid3_lib::BigEndian2String($source_data_array['nexttagoffset'], 4, false);
           }
           break;
 
         case 'AENC':
           // 4.19  AENC Audio encryption
           // Owner identifier   <text string> $00
           // Preview start      $xx xx
           // Preview length     $xx xx
           // Encryption info    <binary data>
           if (!$this->IsWithinBitRange($source_data_array['previewstart'], 16, false)) {
             $this->errors[] = 'Invalid Preview Start in '.$frame_name.' ('.$source_data_array['previewstart'].')';
           } elseif (!$this->IsWithinBitRange($source_data_array['previewlength'], 16, false)) {
             $this->errors[] = 'Invalid Preview Length in '.$frame_name.' ('.$source_data_array['previewlength'].')';
           } else {
             $framedata .= str_replace("\x00", '', $source_data_array['ownerid'])."\x00";
             $framedata .= getid3_lib::BigEndian2String($source_data_array['previewstart'], 2, false);
             $framedata .= getid3_lib::BigEndian2String($source_data_array['previewlength'], 2, false);
             $framedata .= $source_data_array['encryptioninfo'];
           }
           break;
 
         case 'LINK':
           // 4.20  LINK Linked information
           // Frame identifier               $xx xx xx xx
           // URL                            <text string> $00
           // ID and additional data         <text string(s)>
           if (!getid3_id3v2::IsValidID3v2FrameName($source_data_array['frameid'], $this->majorversion)) {
             $this->errors[] = 'Invalid Frame Identifier in '.$frame_name.' ('.$source_data_array['frameid'].')';
           } elseif (!$this->IsValidURL($source_data_array['data'], true, false)) {
             //$this->errors[] = 'Invalid URL in '.$frame_name.' ('.$source_data_array['data'].')';
             // probably should be an error, need to rewrite IsValidURL() to handle other encodings
             $this->warnings[] = 'Invalid URL in '.$frame_name.' ('.$source_data_array['data'].')';
           } elseif ((($source_data_array['frameid'] == 'AENC') || ($source_data_array['frameid'] == 'APIC') || ($source_data_array['frameid'] == 'GEOB') || ($source_data_array['frameid'] == 'TXXX')) && ($source_data_array['additionaldata'] == '')) {
             $this->errors[] = 'Content Descriptor must be specified as additional data for Frame Identifier of '.$source_data_array['frameid'].' in '.$frame_name;
           } elseif (($source_data_array['frameid'] == 'USER') && (getid3_id3v2::LanguageLookup($source_data_array['additionaldata'], true) == '')) {
             $this->errors[] = 'Language must be specified as additional data for Frame Identifier of '.$source_data_array['frameid'].' in '.$frame_name;
           } elseif (($source_data_array['frameid'] == 'PRIV') && ($source_data_array['additionaldata'] == '')) {
             $this->errors[] = 'Owner Identifier must be specified as additional data for Frame Identifier of '.$source_data_array['frameid'].' in '.$frame_name;
           } elseif ((($source_data_array['frameid'] == 'COMM') || ($source_data_array['frameid'] == 'SYLT') || ($source_data_array['frameid'] == 'USLT')) && ((getid3_id3v2::LanguageLookup(substr($source_data_array['additionaldata'], 0, 3), true) == '') || (substr($source_data_array['additionaldata'], 3) == ''))) {
             $this->errors[] = 'Language followed by Content Descriptor must be specified as additional data for Frame Identifier of '.$source_data_array['frameid'].' in '.$frame_name;
           } else {
             $framedata .= $source_data_array['frameid'];
             $framedata .= str_replace("\x00", '', $source_data_array['data'])."\x00";
             switch ($source_data_array['frameid']) {
               case 'COMM':
               case 'SYLT':
               case 'USLT':
               case 'PRIV':
               case 'USER':
               case 'AENC':
               case 'APIC':
               case 'GEOB':
               case 'TXXX':
                 $framedata .= $source_data_array['additionaldata'];
                 break;
               case 'ASPI':
               case 'ETCO':
               case 'EQU2':
               case 'MCID':
               case 'MLLT':
               case 'OWNE':
               case 'RVA2':
               case 'RVRB':
               case 'SYTC':
               case 'IPLS':
               case 'RVAD':
               case 'EQUA':
                 // no additional data required
                 break;
               case 'RBUF':
                 if ($this->majorversion == 3) {
                   // no additional data required
                 } else {
                   $this->errors[] = $source_data_array['frameid'].' is not a valid Frame Identifier in '.$frame_name.' (in ID3v2.'.$this->majorversion.')';
                 }
 
               default:
                 if ((substr($source_data_array['frameid'], 0, 1) == 'T') || (substr($source_data_array['frameid'], 0, 1) == 'W')) {
                   // no additional data required
                 } else {
                   $this->errors[] = $source_data_array['frameid'].' is not a valid Frame Identifier in '.$frame_name.' (in ID3v2.'.$this->majorversion.')';
                 }
                 break;
             }
           }
           break;
 
         case 'POSS':
           // 4.21  POSS Position synchronisation frame (ID3v2.3+ only)
           // Time stamp format         $xx
           // Position                  $xx (xx ...)
           if (($source_data_array['timestampformat'] < 1) || ($source_data_array['timestampformat'] > 2)) {
             $this->errors[] = 'Invalid Time Stamp Format in '.$frame_name.' ('.$source_data_array['timestampformat'].') (valid = 1 or 2)';
           } elseif (!$this->IsWithinBitRange($source_data_array['position'], 32, false)) {
             $this->errors[] = 'Invalid Position in '.$frame_name.' ('.$source_data_array['position'].') (range = 0 to 4294967295)';
           } else {
             $framedata .= chr($source_data_array['timestampformat']);
             $framedata .= getid3_lib::BigEndian2String($source_data_array['position'], 4, false);
           }
           break;
 
         case 'USER':
           // 4.22  USER Terms of use (ID3v2.3+ only)
           // Text encoding        $xx
           // Language             $xx xx xx
           // The actual text      <text string according to encoding>
           $source_data_array['encodingid'] = (isset($source_data_array['encodingid']) ? $source_data_array['encodingid'] : $this->id3v2_default_encodingid);
           if (!$this->ID3v2IsValidTextEncoding($source_data_array['encodingid'])) {
             $this->errors[] = 'Invalid Text Encoding in '.$frame_name.' ('.$source_data_array['encodingid'].')';
           } elseif (getid3_id3v2::LanguageLookup($source_data_array['language'], true) == '') {
             $this->errors[] = 'Invalid Language in '.$frame_name.' ('.$source_data_array['language'].')';
           } else {
             $framedata .= chr($source_data_array['encodingid']);
             $framedata .= strtolower($source_data_array['language']);
             $framedata .= $source_data_array['data'];
           }
           break;
 
         case 'OWNE':
           // 4.23  OWNE Ownership frame (ID3v2.3+ only)
           // Text encoding     $xx
           // Price paid        <text string> $00
           // Date of purch.    <text string>
           // Seller            <text string according to encoding>
           $source_data_array['encodingid'] = (isset($source_data_array['encodingid']) ? $source_data_array['encodingid'] : $this->id3v2_default_encodingid);
           if (!$this->ID3v2IsValidTextEncoding($source_data_array['encodingid'])) {
             $this->errors[] = 'Invalid Text Encoding in '.$frame_name.' ('.$source_data_array['encodingid'].')';
           } elseif (!$this->IsANumber($source_data_array['pricepaid']['value'], false)) {
             $this->errors[] = 'Invalid Price Paid in '.$frame_name.' ('.$source_data_array['pricepaid']['value'].')';
           } elseif (!$this->IsValidDateStampString($source_data_array['purchasedate'])) {
             $this->errors[] = 'Invalid Date Of Purchase in '.$frame_name.' ('.$source_data_array['purchasedate'].') (format = YYYYMMDD)';
           } else {
             $framedata .= chr($source_data_array['encodingid']);
             $framedata .= str_replace("\x00", '', $source_data_array['pricepaid']['value'])."\x00";
             $framedata .= $source_data_array['purchasedate'];
             $framedata .= $source_data_array['seller'];
           }
           break;
 
         case 'COMR':
           // 4.24  COMR Commercial frame (ID3v2.3+ only)
           // Text encoding      $xx
           // Price string       <text string> $00
           // Valid until        <text string>
           // Contact URL        <text string> $00
           // Received as        $xx
           // Name of seller     <text string according to encoding> $00 (00)
           // Description        <text string according to encoding> $00 (00)
           // Picture MIME type  <string> $00
           // Seller logo        <binary data>
           $source_data_array['encodingid'] = (isset($source_data_array['encodingid']) ? $source_data_array['encodingid'] : $this->id3v2_default_encodingid);
           if (!$this->ID3v2IsValidTextEncoding($source_data_array['encodingid'])) {
             $this->errors[] = 'Invalid Text Encoding in '.$frame_name.' ('.$source_data_array['encodingid'].')';
           } elseif (!$this->IsValidDateStampString($source_data_array['pricevaliduntil'])) {
             $this->errors[] = 'Invalid Valid Until date in '.$frame_name.' ('.$source_data_array['pricevaliduntil'].') (format = YYYYMMDD)';
           } elseif (!$this->IsValidURL($source_data_array['contacturl'], false, true)) {
             $this->errors[] = 'Invalid Contact URL in '.$frame_name.' ('.$source_data_array['contacturl'].') (allowed schemes: http, https, ftp, mailto)';
           } elseif (!$this->ID3v2IsValidCOMRreceivedAs($source_data_array['receivedasid'])) {
             $this->errors[] = 'Invalid Received As byte in '.$frame_name.' ('.$source_data_array['contacturl'].') (range = 0 to 8)';
           } elseif (!$this->IsValidMIMEstring($source_data_array['mime'])) {
             $this->errors[] = 'Invalid MIME Type in '.$frame_name.' ('.$source_data_array['mime'].')';
           } else {
             $framedata .= chr($source_data_array['encodingid']);
             unset($pricestring);
             foreach ($source_data_array['price'] as $key => $val) {
               if ($this->ID3v2IsValidPriceString($key.$val['value'])) {
                 $pricestrings[] = $key.$val['value'];
               } else {
                 $this->errors[] = 'Invalid Price String in '.$frame_name.' ('.$key.$val['value'].')';
               }
             }
             $framedata .= implode('/', $pricestrings);
             $framedata .= $source_data_array['pricevaliduntil'];
             $framedata .= str_replace("\x00", '', $source_data_array['contacturl'])."\x00";
             $framedata .= chr($source_data_array['receivedasid']);
             $framedata .= $source_data_array['sellername'].getid3_id3v2::TextEncodingTerminatorLookup($source_data_array['encodingid']);
             $framedata .= $source_data_array['description'].getid3_id3v2::TextEncodingTerminatorLookup($source_data_array['encodingid']);
             $framedata .= $source_data_array['mime']."\x00";
             $framedata .= $source_data_array['logo'];
           }
           break;
 
         case 'ENCR':
           // 4.25  ENCR Encryption method registration (ID3v2.3+ only)
           // Owner identifier    <text string> $00
           // Method symbol       $xx
           // Encryption data     <binary data>
           if (!$this->IsWithinBitRange($source_data_array['methodsymbol'], 8, false)) {
             $this->errors[] = 'Invalid Group Symbol in '.$frame_name.' ('.$source_data_array['methodsymbol'].') (range = 0 to 255)';
           } else {
             $framedata .= str_replace("\x00", '', $source_data_array['ownerid'])."\x00";
             $framedata .= ord($source_data_array['methodsymbol']);
             $framedata .= $source_data_array['data'];
           }
           break;
 
         case 'GRID':
           // 4.26  GRID Group identification registration (ID3v2.3+ only)
           // Owner identifier      <text string> $00
           // Group symbol          $xx
           // Group dependent data  <binary data>
           if (!$this->IsWithinBitRange($source_data_array['groupsymbol'], 8, false)) {
             $this->errors[] = 'Invalid Group Symbol in '.$frame_name.' ('.$source_data_array['groupsymbol'].') (range = 0 to 255)';
           } else {
             $framedata .= str_replace("\x00", '', $source_data_array['ownerid'])."\x00";
             $framedata .= ord($source_data_array['groupsymbol']);
             $framedata .= $source_data_array['data'];
           }
           break;
 
         case 'PRIV':
           // 4.27  PRIV Private frame (ID3v2.3+ only)
           // Owner identifier      <text string> $00
           // The private data      <binary data>
           $framedata .= str_replace("\x00", '', $source_data_array['ownerid'])."\x00";
           $framedata .= $source_data_array['data'];
           break;
 
         case 'SIGN':
           // 4.28  SIGN Signature frame (ID3v2.4+ only)
           // Group symbol      $xx
           // Signature         <binary data>
           if (!$this->IsWithinBitRange($source_data_array['groupsymbol'], 8, false)) {
             $this->errors[] = 'Invalid Group Symbol in '.$frame_name.' ('.$source_data_array['groupsymbol'].') (range = 0 to 255)';
           } else {
             $framedata .= ord($source_data_array['groupsymbol']);
             $framedata .= $source_data_array['data'];
           }
           break;
 
         case 'SEEK':
           // 4.29  SEEK Seek frame (ID3v2.4+ only)
           // Minimum offset to next tag       $xx xx xx xx
           if (!$this->IsWithinBitRange($source_data_array['data'], 32, false)) {
             $this->errors[] = 'Invalid Minimum Offset in '.$frame_name.' ('.$source_data_array['data'].') (range = 0 to 4294967295)';
           } else {
             $framedata .= getid3_lib::BigEndian2String($source_data_array['data'], 4, false);
           }
           break;
 
         case 'ASPI':
           // 4.30  ASPI Audio seek point index (ID3v2.4+ only)
           // Indexed data start (S)         $xx xx xx xx
           // Indexed data length (L)        $xx xx xx xx
           // Number of index points (N)     $xx xx
           // Bits per index point (b)       $xx
           //   Then for every index point the following data is included:
           // Fraction at index (Fi)          $xx (xx)
           if (!$this->IsWithinBitRange($source_data_array['datastart'], 32, false)) {
             $this->errors[] = 'Invalid Indexed Data Start in '.$frame_name.' ('.$source_data_array['datastart'].') (range = 0 to 4294967295)';
           } elseif (!$this->IsWithinBitRange($source_data_array['datalength'], 32, false)) {
             $this->errors[] = 'Invalid Indexed Data Length in '.$frame_name.' ('.$source_data_array['datalength'].') (range = 0 to 4294967295)';
           } elseif (!$this->IsWithinBitRange($source_data_array['indexpoints'], 16, false)) {
             $this->errors[] = 'Invalid Number Of Index Points in '.$frame_name.' ('.$source_data_array['indexpoints'].') (range = 0 to 65535)';
           } elseif (!$this->IsWithinBitRange($source_data_array['bitsperpoint'], 8, false)) {
             $this->errors[] = 'Invalid Bits Per Index Point in '.$frame_name.' ('.$source_data_array['bitsperpoint'].') (range = 0 to 255)';
           } elseif ($source_data_array['indexpoints'] != count($source_data_array['indexes'])) {
             $this->errors[] = 'Number Of Index Points does not match actual supplied data in '.$frame_name;
           } else {
             $framedata .= getid3_lib::BigEndian2String($source_data_array['datastart'], 4, false);
             $framedata .= getid3_lib::BigEndian2String($source_data_array['datalength'], 4, false);
             $framedata .= getid3_lib::BigEndian2String($source_data_array['indexpoints'], 2, false);
             $framedata .= getid3_lib::BigEndian2String($source_data_array['bitsperpoint'], 1, false);
             foreach ($source_data_array['indexes'] as $key => $val) {
               $framedata .= getid3_lib::BigEndian2String($val, ceil($source_data_array['bitsperpoint'] / 8), false);
             }
           }
           break;
 
         case 'RGAD':
           //   RGAD Replay Gain Adjustment
           //   http://privatewww.essex.ac.uk/~djmrob/replaygain/
           // Peak Amplitude                     $xx $xx $xx $xx
           // Radio Replay Gain Adjustment        %aaabbbcd %dddddddd
           // Audiophile Replay Gain Adjustment   %aaabbbcd %dddddddd
           //   a - name code
           //   b - originator code
           //   c - sign bit
           //   d - replay gain adjustment
 
           if (($source_data_array['track_adjustment'] > 51) || ($source_data_array['track_adjustment'] < -51)) {
             $this->errors[] = 'Invalid Track Adjustment in '.$frame_name.' ('.$source_data_array['track_adjustment'].') (range = -51.0 to +51.0)';
           } elseif (($source_data_array['album_adjustment'] > 51) || ($source_data_array['album_adjustment'] < -51)) {
             $this->errors[] = 'Invalid Album Adjustment in '.$frame_name.' ('.$source_data_array['album_adjustment'].') (range = -51.0 to +51.0)';
           } elseif (!$this->ID3v2IsValidRGADname($source_data_array['raw']['track_name'])) {
             $this->errors[] = 'Invalid Track Name Code in '.$frame_name.' ('.$source_data_array['raw']['track_name'].') (range = 0 to 2)';
           } elseif (!$this->ID3v2IsValidRGADname($source_data_array['raw']['album_name'])) {
             $this->errors[] = 'Invalid Album Name Code in '.$frame_name.' ('.$source_data_array['raw']['album_name'].') (range = 0 to 2)';
           } elseif (!$this->ID3v2IsValidRGADoriginator($source_data_array['raw']['track_originator'])) {
             $this->errors[] = 'Invalid Track Originator Code in '.$frame_name.' ('.$source_data_array['raw']['track_originator'].') (range = 0 to 3)';
           } elseif (!$this->ID3v2IsValidRGADoriginator($source_data_array['raw']['album_originator'])) {
             $this->errors[] = 'Invalid Album Originator Code in '.$frame_name.' ('.$source_data_array['raw']['album_originator'].') (range = 0 to 3)';
           } else {
             $framedata .= getid3_lib::Float2String($source_data_array['peakamplitude'], 32);
             $framedata .= getid3_lib::RGADgainString($source_data_array['raw']['track_name'], $source_data_array['raw']['track_originator'], $source_data_array['track_adjustment']);
             $framedata .= getid3_lib::RGADgainString($source_data_array['raw']['album_name'], $source_data_array['raw']['album_originator'], $source_data_array['album_adjustment']);
           }
           break;
 
         default:
           if ((($this->majorversion == 2) && (strlen($frame_name) != 3)) || (($this->majorversion > 2) && (strlen($frame_name) != 4))) {
             $this->errors[] = 'Invalid frame name "'.$frame_name.'" for ID3v2.'.$this->majorversion;
           } elseif ($frame_name{0} == 'T') {
             // 4.2. T???  Text information frames
             // Text encoding                $xx
             // Information                  <text string(s) according to encoding>
             $source_data_array['encodingid'] = (isset($source_data_array['encodingid']) ? $source_data_array['encodingid'] : $this->id3v2_default_encodingid);
             if (!$this->ID3v2IsValidTextEncoding($source_data_array['encodingid'])) {
               $this->errors[] = 'Invalid Text Encoding in '.$frame_name.' ('.$source_data_array['encodingid'].') for ID3v2.'.$this->majorversion;
             } else {
               $framedata .= chr($source_data_array['encodingid']);
               $framedata .= $source_data_array['data'];
             }
           } elseif ($frame_name{0} == 'W') {
             // 4.3. W???  URL link frames
             // URL              <text string>
             if (!$this->IsValidURL($source_data_array['data'], false, false)) {
               //$this->errors[] = 'Invalid URL in '.$frame_name.' ('.$source_data_array['data'].')';
               // probably should be an error, need to rewrite IsValidURL() to handle other encodings
               $this->warnings[] = 'Invalid URL in '.$frame_name.' ('.$source_data_array['data'].')';
             } else {
               $framedata .= $source_data_array['data'];
             }
           } else {
             $this->errors[] = $frame_name.' not yet supported in $this->GenerateID3v2FrameData()';
           }
           break;
       }
     }
     if (!empty($this->errors)) {
       return false;
     }
     return $framedata;
   }
 
   public function ID3v2FrameIsAllowed($frame_name, $source_data_array) {
     static $PreviousFrames = array();
 
     if ($frame_name === null) {
       // if the writing functions are called multiple times, the static array needs to be
       // cleared - this can be done by calling $this->ID3v2FrameIsAllowed(null, '')
       $PreviousFrames = array();
       return true;
     }
 
     if ($this->majorversion == 4) {
       switch ($frame_name) {
         case 'UFID':
         case 'AENC':
         case 'ENCR':
         case 'GRID':
           if (!isset($source_data_array['ownerid'])) {
             $this->errors[] = '[ownerid] not specified for '.$frame_name;
           } elseif (in_array($frame_name.$source_data_array['ownerid'], $PreviousFrames)) {
             $this->errors[] = 'Only one '.$frame_name.' tag allowed with the same OwnerID ('.$source_data_array['ownerid'].')';
           } else {
             $PreviousFrames[] = $frame_name.$source_data_array['ownerid'];
           }
           break;
 
         case 'TXXX':
         case 'WXXX':
         case 'RVA2':
         case 'EQU2':
         case 'APIC':
         case 'GEOB':
           if (!isset($source_data_array['description'])) {
             $this->errors[] = '[description] not specified for '.$frame_name;
           } elseif (in_array($frame_name.$source_data_array['description'], $PreviousFrames)) {
             $this->errors[] = 'Only one '.$frame_name.' tag allowed with the same Description ('.$source_data_array['description'].')';
           } else {
             $PreviousFrames[] = $frame_name.$source_data_array['description'];
           }
           break;
 
         case 'USER':
           if (!isset($source_data_array['language'])) {
             $this->errors[] = '[language] not specified for '.$frame_name;
           } elseif (in_array($frame_name.$source_data_array['language'], $PreviousFrames)) {
             $this->errors[] = 'Only one '.$frame_name.' tag allowed with the same Language ('.$source_data_array['language'].')';
           } else {
             $PreviousFrames[] = $frame_name.$source_data_array['language'];
           }
           break;
 
         case 'USLT':
         case 'SYLT':
         case 'COMM':
           if (!isset($source_data_array['language'])) {
             $this->errors[] = '[language] not specified for '.$frame_name;
           } elseif (!isset($source_data_array['description'])) {
             $this->errors[] = '[description] not specified for '.$frame_name;
           } elseif (in_array($frame_name.$source_data_array['language'].$source_data_array['description'], $PreviousFrames)) {
             $this->errors[] = 'Only one '.$frame_name.' tag allowed with the same Language + Description ('.$source_data_array['language'].' + '.$source_data_array['description'].')';
           } else {
             $PreviousFrames[] = $frame_name.$source_data_array['language'].$source_data_array['description'];
           }
           break;
 
         case 'POPM':
           if (!isset($source_data_array['email'])) {
             $this->errors[] = '[email] not specified for '.$frame_name;
           } elseif (in_array($frame_name.$source_data_array['email'], $PreviousFrames)) {
             $this->errors[] = 'Only one '.$frame_name.' tag allowed with the same Email ('.$source_data_array['email'].')';
           } else {
             $PreviousFrames[] = $frame_name.$source_data_array['email'];
           }
           break;
 
         case 'IPLS':
         case 'MCDI':
         case 'ETCO':
         case 'MLLT':
         case 'SYTC':
         case 'RVRB':
         case 'PCNT':
         case 'RBUF':
         case 'POSS':
         case 'OWNE':
         case 'SEEK':
         case 'ASPI':
         case 'RGAD':
           if (in_array($frame_name, $PreviousFrames)) {
             $this->errors[] = 'Only one '.$frame_name.' tag allowed';
           } else {
             $PreviousFrames[] = $frame_name;
           }
           break;
 
         case 'LINK':
           // this isn't implemented quite right (yet) - it should check the target frame data for compliance
           // but right now it just allows one linked frame of each type, to be safe.
           if (!isset($source_data_array['frameid'])) {
             $this->errors[] = '[frameid] not specified for '.$frame_name;
           } elseif (in_array($frame_name.$source_data_array['frameid'], $PreviousFrames)) {
             $this->errors[] = 'Only one '.$frame_name.' tag allowed with the same FrameID ('.$source_data_array['frameid'].')';
           } elseif (in_array($source_data_array['frameid'], $PreviousFrames)) {
             // no links to singleton tags
             $this->errors[] = 'Cannot specify a '.$frame_name.' tag to a singleton tag that already exists ('.$source_data_array['frameid'].')';
           } else {
             $PreviousFrames[] = $frame_name.$source_data_array['frameid']; // only one linked tag of this type
             $PreviousFrames[] = $source_data_array['frameid'];             // no non-linked singleton tags of this type
           }
           break;
 
         case 'COMR':
           //   There may be more than one 'commercial frame' in a tag, but no two may be identical
           // Checking isn't implemented at all (yet) - just assumes that it's OK.
           break;
 
         case 'PRIV':
         case 'SIGN':
           if (!isset($source_data_array['ownerid'])) {
             $this->errors[] = '[ownerid] not specified for '.$frame_name;
           } elseif (!isset($source_data_array['data'])) {
             $this->errors[] = '[data] not specified for '.$frame_name;
           } elseif (in_array($frame_name.$source_data_array['ownerid'].$source_data_array['data'], $PreviousFrames)) {
             $this->errors[] = 'Only one '.$frame_name.' tag allowed with the same OwnerID + Data ('.$source_data_array['ownerid'].' + '.$source_data_array['data'].')';
           } else {
             $PreviousFrames[] = $frame_name.$source_data_array['ownerid'].$source_data_array['data'];
           }
           break;
 
         default:
           if (($frame_name{0} != 'T') && ($frame_name{0} != 'W')) {
             $this->errors[] = 'Frame not allowed in ID3v2.'.$this->majorversion.': '.$frame_name;
           }
           break;
       }
 
     } elseif ($this->majorversion == 3) {
 
       switch ($frame_name) {
         case 'UFID':
         case 'AENC':
         case 'ENCR':
         case 'GRID':
           if (!isset($source_data_array['ownerid'])) {
             $this->errors[] = '[ownerid] not specified for '.$frame_name;
           } elseif (in_array($frame_name.$source_data_array['ownerid'], $PreviousFrames)) {
             $this->errors[] = 'Only one '.$frame_name.' tag allowed with the same OwnerID ('.$source_data_array['ownerid'].')';
           } else {
             $PreviousFrames[] = $frame_name.$source_data_array['ownerid'];
           }
           break;
 
         case 'TXXX':
         case 'WXXX':
         case 'APIC':
         case 'GEOB':
           if (!isset($source_data_array['description'])) {
             $this->errors[] = '[description] not specified for '.$frame_name;
           } elseif (in_array($frame_name.$source_data_array['description'], $PreviousFrames)) {
             $this->errors[] = 'Only one '.$frame_name.' tag allowed with the same Description ('.$source_data_array['description'].')';
           } else {
             $PreviousFrames[] = $frame_name.$source_data_array['description'];
           }
           break;
 
         case 'USER':
           if (!isset($source_data_array['language'])) {
             $this->errors[] = '[language] not specified for '.$frame_name;
           } elseif (in_array($frame_name.$source_data_array['language'], $PreviousFrames)) {
             $this->errors[] = 'Only one '.$frame_name.' tag allowed with the same Language ('.$source_data_array['language'].')';
           } else {
             $PreviousFrames[] = $frame_name.$source_data_array['language'];
           }
           break;
 
         case 'USLT':
         case 'SYLT':
         case 'COMM':
           if (!isset($source_data_array['language'])) {
             $this->errors[] = '[language] not specified for '.$frame_name;
           } elseif (!isset($source_data_array['description'])) {
             $this->errors[] = '[description] not specified for '.$frame_name;
           } elseif (in_array($frame_name.$source_data_array['language'].$source_data_array['description'], $PreviousFrames)) {
             $this->errors[] = 'Only one '.$frame_name.' tag allowed with the same Language + Description ('.$source_data_array['language'].' + '.$source_data_array['description'].')';
           } else {
             $PreviousFrames[] = $frame_name.$source_data_array['language'].$source_data_array['description'];
           }
           break;
 
         case 'POPM':
           if (!isset($source_data_array['email'])) {
             $this->errors[] = '[email] not specified for '.$frame_name;
           } elseif (in_array($frame_name.$source_data_array['email'], $PreviousFrames)) {
             $this->errors[] = 'Only one '.$frame_name.' tag allowed with the same Email ('.$source_data_array['email'].')';
           } else {
             $PreviousFrames[] = $frame_name.$source_data_array['email'];
           }
           break;
 
         case 'IPLS':
         case 'MCDI':
         case 'ETCO':
         case 'MLLT':
         case 'SYTC':
         case 'RVAD':
         case 'EQUA':
         case 'RVRB':
         case 'PCNT':
         case 'RBUF':
         case 'POSS':
         case 'OWNE':
         case 'RGAD':
           if (in_array($frame_name, $PreviousFrames)) {
             $this->errors[] = 'Only one '.$frame_name.' tag allowed';
           } else {
             $PreviousFrames[] = $frame_name;
           }
           break;
 
         case 'LINK':
           // this isn't implemented quite right (yet) - it should check the target frame data for compliance
           // but right now it just allows one linked frame of each type, to be safe.
           if (!isset($source_data_array['frameid'])) {
             $this->errors[] = '[frameid] not specified for '.$frame_name;
           } elseif (in_array($frame_name.$source_data_array['frameid'], $PreviousFrames)) {
             $this->errors[] = 'Only one '.$frame_name.' tag allowed with the same FrameID ('.$source_data_array['frameid'].')';
           } elseif (in_array($source_data_array['frameid'], $PreviousFrames)) {
             // no links to singleton tags
             $this->errors[] = 'Cannot specify a '.$frame_name.' tag to a singleton tag that already exists ('.$source_data_array['frameid'].')';
           } else {
             $PreviousFrames[] = $frame_name.$source_data_array['frameid']; // only one linked tag of this type
             $PreviousFrames[] = $source_data_array['frameid'];             // no non-linked singleton tags of this type
           }
           break;
 
         case 'COMR':
           //   There may be more than one 'commercial frame' in a tag, but no two may be identical
           // Checking isn't implemented at all (yet) - just assumes that it's OK.
           break;
 
         case 'PRIV':
           if (!isset($source_data_array['ownerid'])) {
             $this->errors[] = '[ownerid] not specified for '.$frame_name;
           } elseif (!isset($source_data_array['data'])) {
             $this->errors[] = '[data] not specified for '.$frame_name;
           } elseif (in_array($frame_name.$source_data_array['ownerid'].$source_data_array['data'], $PreviousFrames)) {
             $this->errors[] = 'Only one '.$frame_name.' tag allowed with the same OwnerID + Data ('.$source_data_array['ownerid'].' + '.$source_data_array['data'].')';
           } else {
             $PreviousFrames[] = $frame_name.$source_data_array['ownerid'].$source_data_array['data'];
           }
           break;
 
         default:
           if (($frame_name{0} != 'T') && ($frame_name{0} != 'W')) {
             $this->errors[] = 'Frame not allowed in ID3v2.'.$this->majorversion.': '.$frame_name;
           }
           break;
       }
 
     } elseif ($this->majorversion == 2) {
 
       switch ($frame_name) {
         case 'UFI':
         case 'CRM':
         case 'CRA':
           if (!isset($source_data_array['ownerid'])) {
             $this->errors[] = '[ownerid] not specified for '.$frame_name;
           } elseif (in_array($frame_name.$source_data_array['ownerid'], $PreviousFrames)) {
             $this->errors[] = 'Only one '.$frame_name.' tag allowed with the same OwnerID ('.$source_data_array['ownerid'].')';
           } else {
             $PreviousFrames[] = $frame_name.$source_data_array['ownerid'];
           }
           break;
 
         case 'TXX':
         case 'WXX':
         case 'PIC':
         case 'GEO':
           if (!isset($source_data_array['description'])) {
             $this->errors[] = '[description] not specified for '.$frame_name;
           } elseif (in_array($frame_name.$source_data_array['description'], $PreviousFrames)) {
             $this->errors[] = 'Only one '.$frame_name.' tag allowed with the same Description ('.$source_data_array['description'].')';
           } else {
             $PreviousFrames[] = $frame_name.$source_data_array['description'];
           }
           break;
 
         case 'ULT':
         case 'SLT':
         case 'COM':
           if (!isset($source_data_array['language'])) {
             $this->errors[] = '[language] not specified for '.$frame_name;
           } elseif (!isset($source_data_array['description'])) {
             $this->errors[] = '[description] not specified for '.$frame_name;
           } elseif (in_array($frame_name.$source_data_array['language'].$source_data_array['description'], $PreviousFrames)) {
             $this->errors[] = 'Only one '.$frame_name.' tag allowed with the same Language + Description ('.$source_data_array['language'].' + '.$source_data_array['description'].')';
           } else {
             $PreviousFrames[] = $frame_name.$source_data_array['language'].$source_data_array['description'];
           }
           break;
 
         case 'POP':
           if (!isset($source_data_array['email'])) {
             $this->errors[] = '[email] not specified for '.$frame_name;
           } elseif (in_array($frame_name.$source_data_array['email'], $PreviousFrames)) {
             $this->errors[] = 'Only one '.$frame_name.' tag allowed with the same Email ('.$source_data_array['email'].')';
           } else {
             $PreviousFrames[] = $frame_name.$source_data_array['email'];
           }
           break;
 
         case 'IPL':
         case 'MCI':
         case 'ETC':
         case 'MLL':
         case 'STC':
         case 'RVA':
         case 'EQU':
         case 'REV':
         case 'CNT':
         case 'BUF':
           if (in_array($frame_name, $PreviousFrames)) {
             $this->errors[] = 'Only one '.$frame_name.' tag allowed';
           } else {
             $PreviousFrames[] = $frame_name;
           }
           break;
 
         case 'LNK':
           // this isn't implemented quite right (yet) - it should check the target frame data for compliance
           // but right now it just allows one linked frame of each type, to be safe.
           if (!isset($source_data_array['frameid'])) {
             $this->errors[] = '[frameid] not specified for '.$frame_name;
           } elseif (in_array($frame_name.$source_data_array['frameid'], $PreviousFrames)) {
             $this->errors[] = 'Only one '.$frame_name.' tag allowed with the same FrameID ('.$source_data_array['frameid'].')';
           } elseif (in_array($source_data_array['frameid'], $PreviousFrames)) {
             // no links to singleton tags
             $this->errors[] = 'Cannot specify a '.$frame_name.' tag to a singleton tag that already exists ('.$source_data_array['frameid'].')';
           } else {
             $PreviousFrames[] = $frame_name.$source_data_array['frameid']; // only one linked tag of this type
             $PreviousFrames[] = $source_data_array['frameid'];             // no non-linked singleton tags of this type
           }
           break;
 
         default:
           if (($frame_name{0} != 'T') && ($frame_name{0} != 'W')) {
             $this->errors[] = 'Frame not allowed in ID3v2.'.$this->majorversion.': '.$frame_name;
           }
           break;
       }
     }
 
     if (!empty($this->errors)) {
       return false;
     }
     return true;
   }
 
   public function GenerateID3v2Tag($noerrorsonly=true) {
     $this->ID3v2FrameIsAllowed(null, ''); // clear static array in case this isn't the first call to $this->GenerateID3v2Tag()
 
     $tagstring = '';
     if (is_array($this->tag_data)) {
       foreach ($this->tag_data as $frame_name => $frame_rawinputdata) {
         foreach ($frame_rawinputdata as $irrelevantindex => $source_data_array) {
           if (getid3_id3v2::IsValidID3v2FrameName($frame_name, $this->majorversion)) {
             unset($frame_length);
             unset($frame_flags);
             $frame_data = false;
             if ($this->ID3v2FrameIsAllowed($frame_name, $source_data_array)) {
               if ($frame_data = $this->GenerateID3v2FrameData($frame_name, $source_data_array)) {
                 $FrameUnsynchronisation = false;
                 if ($this->majorversion >= 4) {
                   // frame-level unsynchronisation
                   $unsynchdata = $frame_data;
                   if ($this->id3v2_use_unsynchronisation) {
                     $unsynchdata = $this->Unsynchronise($frame_data);
                   }
                   if (strlen($unsynchdata) != strlen($frame_data)) {
                     // unsynchronisation needed
                     $FrameUnsynchronisation = true;
                     $frame_data = $unsynchdata;
                     if (isset($TagUnsynchronisation) && $TagUnsynchronisation === false) {
                       // only set to true if ALL frames are unsynchronised
                     } else {
                       $TagUnsynchronisation = true;
                     }
                   } else {
                     if (isset($TagUnsynchronisation)) {
                       $TagUnsynchronisation = false;
                     }
                   }
                   unset($unsynchdata);
 
                   $frame_length = getid3_lib::BigEndian2String(strlen($frame_data), 4, true);
                 } else {
                   $frame_length = getid3_lib::BigEndian2String(strlen($frame_data), 4, false);
                 }
                 $frame_flags  = $this->GenerateID3v2FrameFlags($this->ID3v2FrameFlagsLookupTagAlter($frame_name), $this->ID3v2FrameFlagsLookupFileAlter($frame_name), false, false, false, false, $FrameUnsynchronisation, false);
               }
             } else {
               $this->errors[] = 'Frame "'.$frame_name.'" is NOT allowed';
             }
             if ($frame_data === false) {
               $this->errors[] = '$this->GenerateID3v2FrameData() failed for "'.$frame_name.'"';
               if ($noerrorsonly) {
                 return false;
               } else {
                 unset($frame_name);
               }
             }
           } else {
             // ignore any invalid frame names, including 'title', 'header', etc
             $this->warnings[] = 'Ignoring invalid ID3v2 frame type: "'.$frame_name.'"';
             unset($frame_name);
             unset($frame_length);
             unset($frame_flags);
             unset($frame_data);
           }
           if (isset($frame_name) && isset($frame_length) && isset($frame_flags) && isset($frame_data)) {
             $tagstring .= $frame_name.$frame_length.$frame_flags.$frame_data;
           }
         }
       }
 
       if (!isset($TagUnsynchronisation)) {
         $TagUnsynchronisation = false;
       }
       if (($this->majorversion <= 3) && $this->id3v2_use_unsynchronisation) {
         // tag-level unsynchronisation
         $unsynchdata = $this->Unsynchronise($tagstring);
         if (strlen($unsynchdata) != strlen($tagstring)) {
           // unsynchronisation needed
           $TagUnsynchronisation = true;
           $tagstring = $unsynchdata;
         }
       }
 
       while ($this->paddedlength < (strlen($tagstring) + getid3_id3v2::ID3v2HeaderLength($this->majorversion))) {
         $this->paddedlength += 1024;
       }
 
       $footer = false; // ID3v2 footers not yet supported in getID3()
       if (!$footer && ($this->paddedlength > (strlen($tagstring) + getid3_id3v2::ID3v2HeaderLength($this->majorversion)))) {
         // pad up to $paddedlength bytes if unpadded tag is shorter than $paddedlength
         // "Furthermore it MUST NOT have any padding when a tag footer is added to the tag."
         if (($this->paddedlength - strlen($tagstring) - getid3_id3v2::ID3v2HeaderLength($this->majorversion)) > 0) {
           $tagstring .= str_repeat("\x00", $this->paddedlength - strlen($tagstring) - getid3_id3v2::ID3v2HeaderLength($this->majorversion));
         }
       }
       if ($this->id3v2_use_unsynchronisation && (substr($tagstring, strlen($tagstring) - 1, 1) == "\xFF")) {
         // special unsynchronisation case:
         // if last byte == $FF then appended a $00
         $TagUnsynchronisation = true;
         $tagstring .= "\x00";
       }
 
       $tagheader  = 'ID3';
       $tagheader .= chr($this->majorversion);
       $tagheader .= chr($this->minorversion);
       $tagheader .= $this->GenerateID3v2TagFlags(array('unsynchronisation'=>$TagUnsynchronisation));
       $tagheader .= getid3_lib::BigEndian2String(strlen($tagstring), 4, true);
 
       return $tagheader.$tagstring;
     }
     $this->errors[] = 'tag_data is not an array in GenerateID3v2Tag()';
     return false;
   }
 
   public function ID3v2IsValidPriceString($pricestring) {
     if (getid3_id3v2::LanguageLookup(substr($pricestring, 0, 3), true) == '') {
       return false;
     } elseif (!$this->IsANumber(substr($pricestring, 3), true)) {
       return false;
     }
     return true;
   }
 
   public function ID3v2FrameFlagsLookupTagAlter($framename) {
     // unfinished
     switch ($framename) {
       case 'RGAD':
         $allow = true;
       default:
         $allow = false;
         break;
     }
     return $allow;
   }
 
   public function ID3v2FrameFlagsLookupFileAlter($framename) {
     // unfinished
     switch ($framename) {
       case 'RGAD':
         return false;
         break;
 
       default:
         return false;
         break;
     }
   }
 
   public function ID3v2IsValidETCOevent($eventid) {
     if (($eventid < 0) || ($eventid > 0xFF)) {
       // outside range of 1 byte
       return false;
     } elseif (($eventid >= 0xF0) && ($eventid <= 0xFC)) {
       // reserved for future use
       return false;
     } elseif (($eventid >= 0x17) && ($eventid <= 0xDF)) {
       // reserved for future use
       return false;
     } elseif (($eventid >= 0x0E) && ($eventid <= 0x16) && ($this->majorversion == 2)) {
       // not defined in ID3v2.2
       return false;
     } elseif (($eventid >= 0x15) && ($eventid <= 0x16) && ($this->majorversion == 3)) {
       // not defined in ID3v2.3
       return false;
     }
     return true;
   }
 
   public function ID3v2IsValidSYLTtype($contenttype) {
     if (($contenttype >= 0) && ($contenttype <= 8) && ($this->majorversion == 4)) {
       return true;
     } elseif (($contenttype >= 0) && ($contenttype <= 6) && ($this->majorversion == 3)) {
       return true;
     }
     return false;
   }
 
   public function ID3v2IsValidRVA2channeltype($channeltype) {
     if (($channeltype >= 0) && ($channeltype <= 8) && ($this->majorversion == 4)) {
       return true;
     }
     return false;
   }
 
   public function ID3v2IsValidAPICpicturetype($picturetype) {
     if (($picturetype >= 0) && ($picturetype <= 0x14) && ($this->majorversion >= 2) && ($this->majorversion <= 4)) {
       return true;
     }
     return false;
   }
 
   public function ID3v2IsValidAPICimageformat($imageformat) {
     if ($imageformat == '-->') {
       return true;
     } elseif ($this->majorversion == 2) {
       if ((strlen($imageformat) == 3) && ($imageformat == strtoupper($imageformat))) {
         return true;
       }
     } elseif (($this->majorversion == 3) || ($this->majorversion == 4)) {
       if ($this->IsValidMIMEstring($imageformat)) {
         return true;
       }
     }
     return false;
   }
 
   public function ID3v2IsValidCOMRreceivedAs($receivedas) {
     if (($this->majorversion >= 3) && ($receivedas >= 0) && ($receivedas <= 8)) {
       return true;
     }
     return false;
   }
 
   public function ID3v2IsValidRGADname($RGADname) {
     if (($RGADname >= 0) && ($RGADname <= 2)) {
       return true;
     }
     return false;
   }
 
   public function ID3v2IsValidRGADoriginator($RGADoriginator) {
     if (($RGADoriginator >= 0) && ($RGADoriginator <= 3)) {
       return true;
     }
     return false;
   }
 
   public function ID3v2IsValidTextEncoding($textencodingbyte) {
     static $ID3v2IsValidTextEncoding_cache = array(
       2 => array(true, true),
       3 => array(true, true),
       4 => array(true, true, true, true));
     return isset($ID3v2IsValidTextEncoding_cache[$this->majorversion][$textencodingbyte]);
   }
 
   public function Unsynchronise($data) {
     // Whenever a false synchronisation is found within the tag, one zeroed
     // byte is inserted after the first false synchronisation byte. The
     // format of a correct sync that should be altered by ID3 encoders is as
     // follows:
     //      %11111111 111xxxxx
     // And should be replaced with:
     //      %11111111 00000000 111xxxxx
     // This has the side effect that all $FF 00 combinations have to be
     // altered, so they won't be affected by the decoding process. Therefore
     // all the $FF 00 combinations have to be replaced with the $FF 00 00
     // combination during the unsynchronisation.
 
     $data = str_replace("\xFF\x00", "\xFF\x00\x00", $data);
     $unsyncheddata = '';
     $datalength = strlen($data);
     for ($i = 0; $i < $datalength; $i++) {
       $thischar = $data{$i};
       $unsyncheddata .= $thischar;
       if ($thischar == "\xFF") {
         $nextchar = ord($data{$i + 1});
         if (($nextchar & 0xE0) == 0xE0) {
           // previous byte = 11111111, this byte = 111?????
           $unsyncheddata .= "\x00";
         }
       }
     }
     return $unsyncheddata;
   }
 
   public function is_hash($var) {
     // written by dev-nullØchristophe*vg
     // taken from http://www.php.net/manual/en/function.array-merge-recursive.php
     if (is_array($var)) {
       $keys = array_keys($var);
       $all_num = true;
       for ($i = 0; $i < count($keys); $i++) {
         if (is_string($keys[$i])) {
           return true;
         }
       }
     }
     return false;
   }
 
   public function array_join_merge($arr1, $arr2) {
     // written by dev-nullØchristophe*vg
     // taken from http://www.php.net/manual/en/function.array-merge-recursive.php
     if (is_array($arr1) && is_array($arr2)) {
       // the same -> merge
       $new_array = array();
 
       if ($this->is_hash($arr1) && $this->is_hash($arr2)) {
         // hashes -> merge based on keys
         $keys = array_merge(array_keys($arr1), array_keys($arr2));
         foreach ($keys as $key) {
           $new_array[$key] = $this->array_join_merge((isset($arr1[$key]) ? $arr1[$key] : ''), (isset($arr2[$key]) ? $arr2[$key] : ''));
         }
       } else {
         // two real arrays -> merge
         $new_array = array_reverse(array_unique(array_reverse(array_merge($arr1, $arr2))));
       }
       return $new_array;
     } else {
       // not the same ... take new one if defined, else the old one stays
       return $arr2 ? $arr2 : $arr1;
     }
   }
 
   public function IsValidMIMEstring($mimestring) {
     if ((strlen($mimestring) >= 3) && (strpos($mimestring, '/') > 0) && (strpos($mimestring, '/') < (strlen($mimestring) - 1))) {
       return true;
     }
     return false;
   }
 
   public function IsWithinBitRange($number, $maxbits, $signed=false) {
     if ($signed) {
       if (($number > (0 - pow(2, $maxbits - 1))) && ($number <= pow(2, $maxbits - 1))) {
         return true;
       }
     } else {
       if (($number >= 0) && ($number <= pow(2, $maxbits))) {
         return true;
       }
     }
     return false;
   }
 
   public function safe_parse_url($url) {
     $parts = @parse_url($url);
     $parts['scheme'] = (isset($parts['scheme']) ? $parts['scheme'] : '');
     $parts['host']   = (isset($parts['host'])   ? $parts['host']   : '');
     $parts['user']   = (isset($parts['user'])   ? $parts['user']   : '');
     $parts['pass']   = (isset($parts['pass'])   ? $parts['pass']   : '');
     $parts['path']   = (isset($parts['path'])   ? $parts['path']   : '');
     $parts['query']  = (isset($parts['query'])  ? $parts['query']  : '');
     return $parts;
   }
 
   public function IsValidURL($url, $allowUserPass=false) {
     if ($url == '') {
       return false;
     }
     if ($allowUserPass !== true) {
       if (strstr($url, '@')) {
         // in the format http://user:pass@example.com  or http://user@example.com
         // but could easily be somebody incorrectly entering an email address in place of a URL
         return false;
       }
     }
     if ($parts = $this->safe_parse_url($url)) {
       if (($parts['scheme'] != 'http') && ($parts['scheme'] != 'https') && ($parts['scheme'] != 'ftp') && ($parts['scheme'] != 'gopher')) {
         return false;
       } elseif (!preg_match('#^[[:alnum:]]([-.]?[0-9a-z])*\\.[a-z]{2,3}$#i', $parts['host'], $regs) && !preg_match('#^[0-9]{1,3}(\\.[0-9]{1,3}){3}$#', $parts['host'])) {
         return false;
       } elseif (!preg_match('#^([[:alnum:]-]|[\\_])*$#i', $parts['user'], $regs)) {
         return false;
       } elseif (!preg_match('#^([[:alnum:]-]|[\\_])*$#i', $parts['pass'], $regs)) {
         return false;
       } elseif (!preg_match('#^[[:alnum:]/_\\.@~-]*$#i', $parts['path'], $regs)) {
         return false;
       } elseif (!empty($parts['query']) && !preg_match('#^[[:alnum:]?&=+:;_()%\\#/,\\.-]*$#i', $parts['query'], $regs)) {
         return false;
       } else {
         return true;
       }
     }
     return false;
   }
 
   public static function ID3v2ShortFrameNameLookup($majorversion, $long_description) {
     $long_description = str_replace(' ', '_', strtolower(trim($long_description)));
     static $ID3v2ShortFrameNameLookup = array();
     if (empty($ID3v2ShortFrameNameLookup)) {
 
       // The following are unique to ID3v2.2
       $ID3v2ShortFrameNameLookup[2]['comment']                                          = 'COM';
       $ID3v2ShortFrameNameLookup[2]['album']                                            = 'TAL';
       $ID3v2ShortFrameNameLookup[2]['beats_per_minute']                                 = 'TBP';
       $ID3v2ShortFrameNameLookup[2]['composer']                                         = 'TCM';
       $ID3v2ShortFrameNameLookup[2]['genre']                                            = 'TCO';
       $ID3v2ShortFrameNameLookup[2]['itunescompilation']                                = 'TCP';
       $ID3v2ShortFrameNameLookup[2]['copyright']                                        = 'TCR';
       $ID3v2ShortFrameNameLookup[2]['encoded_by']                                       = 'TEN';
       $ID3v2ShortFrameNameLookup[2]['language']                                         = 'TLA';
       $ID3v2ShortFrameNameLookup[2]['length']                                           = 'TLE';
       $ID3v2ShortFrameNameLookup[2]['original_artist']                                  = 'TOA';
       $ID3v2ShortFrameNameLookup[2]['original_filename']                                = 'TOF';
       $ID3v2ShortFrameNameLookup[2]['original_lyricist']                                = 'TOL';
       $ID3v2ShortFrameNameLookup[2]['original_album_title']                             = 'TOT';
       $ID3v2ShortFrameNameLookup[2]['artist']                                           = 'TP1';
       $ID3v2ShortFrameNameLookup[2]['band']                                             = 'TP2';
       $ID3v2ShortFrameNameLookup[2]['conductor']                                        = 'TP3';
       $ID3v2ShortFrameNameLookup[2]['remixer']                                          = 'TP4';
       $ID3v2ShortFrameNameLookup[2]['publisher']                                        = 'TPB';
       $ID3v2ShortFrameNameLookup[2]['isrc']                                             = 'TRC';
       $ID3v2ShortFrameNameLookup[2]['tracknumber']                                      = 'TRK';
       $ID3v2ShortFrameNameLookup[2]['size']                                             = 'TSI';
       $ID3v2ShortFrameNameLookup[2]['encoder_settings']                                 = 'TSS';
       $ID3v2ShortFrameNameLookup[2]['description']                                      = 'TT1';
       $ID3v2ShortFrameNameLookup[2]['title']                                            = 'TT2';
       $ID3v2ShortFrameNameLookup[2]['subtitle']                                         = 'TT3';
       $ID3v2ShortFrameNameLookup[2]['lyricist']                                         = 'TXT';
       $ID3v2ShortFrameNameLookup[2]['user_text']                                        = 'TXX';
       $ID3v2ShortFrameNameLookup[2]['year']                                             = 'TYE';
       $ID3v2ShortFrameNameLookup[2]['unique_file_identifier']                           = 'UFI';
       $ID3v2ShortFrameNameLookup[2]['unsynchronised_lyrics']                            = 'ULT';
       $ID3v2ShortFrameNameLookup[2]['url_file']                                         = 'WAF';
       $ID3v2ShortFrameNameLookup[2]['url_artist']                                       = 'WAR';
       $ID3v2ShortFrameNameLookup[2]['url_source']                                       = 'WAS';
       $ID3v2ShortFrameNameLookup[2]['copyright_information']                            = 'WCP';
       $ID3v2ShortFrameNameLookup[2]['url_publisher']                                    = 'WPB';
       $ID3v2ShortFrameNameLookup[2]['url_user']                                         = 'WXX';
 
       // The following are common to ID3v2.3 and ID3v2.4
       $ID3v2ShortFrameNameLookup[3]['audio_encryption']                                 = 'AENC';
       $ID3v2ShortFrameNameLookup[3]['attached_picture']                                 = 'APIC';
       $ID3v2ShortFrameNameLookup[3]['comment']                                          = 'COMM';
       $ID3v2ShortFrameNameLookup[3]['commercial']                                       = 'COMR';
       $ID3v2ShortFrameNameLookup[3]['encryption_method_registration']                   = 'ENCR';
       $ID3v2ShortFrameNameLookup[3]['event_timing_codes']                               = 'ETCO';
       $ID3v2ShortFrameNameLookup[3]['general_encapsulated_object']                      = 'GEOB';
       $ID3v2ShortFrameNameLookup[3]['group_identification_registration']                = 'GRID';
       $ID3v2ShortFrameNameLookup[3]['linked_information']                               = 'LINK';
       $ID3v2ShortFrameNameLookup[3]['music_cd_identifier']                              = 'MCDI';
       $ID3v2ShortFrameNameLookup[3]['mpeg_location_lookup_table']                       = 'MLLT';
       $ID3v2ShortFrameNameLookup[3]['ownership']                                        = 'OWNE';
       $ID3v2ShortFrameNameLookup[3]['play_counter']                                     = 'PCNT';
       $ID3v2ShortFrameNameLookup[3]['popularimeter']                                    = 'POPM';
       $ID3v2ShortFrameNameLookup[3]['position_synchronisation']                         = 'POSS';
       $ID3v2ShortFrameNameLookup[3]['private']                                          = 'PRIV';
       $ID3v2ShortFrameNameLookup[3]['recommended_buffer_size']                          = 'RBUF';
       $ID3v2ShortFrameNameLookup[3]['reverb']                                           = 'RVRB';
       $ID3v2ShortFrameNameLookup[3]['synchronised_lyrics']                              = 'SYLT';
       $ID3v2ShortFrameNameLookup[3]['synchronised_tempo_codes']                         = 'SYTC';
       $ID3v2ShortFrameNameLookup[3]['album']                                            = 'TALB';
       $ID3v2ShortFrameNameLookup[3]['beats_per_minute']                                 = 'TBPM';
       $ID3v2ShortFrameNameLookup[3]['itunescompilation']                                = 'TCMP';
       $ID3v2ShortFrameNameLookup[3]['composer']                                         = 'TCOM';
       $ID3v2ShortFrameNameLookup[3]['genre']                                            = 'TCON';
       $ID3v2ShortFrameNameLookup[3]['copyright']                                        = 'TCOP';
       $ID3v2ShortFrameNameLookup[3]['playlist_delay']                                   = 'TDLY';
       $ID3v2ShortFrameNameLookup[3]['encoded_by']                                       = 'TENC';
       $ID3v2ShortFrameNameLookup[3]['lyricist']                                         = 'TEXT';
       $ID3v2ShortFrameNameLookup[3]['file_type']                                        = 'TFLT';
       $ID3v2ShortFrameNameLookup[3]['content_group_description']                        = 'TIT1';
       $ID3v2ShortFrameNameLookup[3]['title']                                            = 'TIT2';
       $ID3v2ShortFrameNameLookup[3]['subtitle']                                         = 'TIT3';
       $ID3v2ShortFrameNameLookup[3]['initial_key']                                      = 'TKEY';
       $ID3v2ShortFrameNameLookup[3]['language']                                         = 'TLAN';
       $ID3v2ShortFrameNameLookup[3]['length']                                           = 'TLEN';
       $ID3v2ShortFrameNameLookup[3]['media_type']                                       = 'TMED';
       $ID3v2ShortFrameNameLookup[3]['original_album_title']                             = 'TOAL';
       $ID3v2ShortFrameNameLookup[3]['original_filename']                                = 'TOFN';
       $ID3v2ShortFrameNameLookup[3]['original_lyricist']                                = 'TOLY';
       $ID3v2ShortFrameNameLookup[3]['original_artist']                                  = 'TOPE';
       $ID3v2ShortFrameNameLookup[3]['file_owner']                                       = 'TOWN';
       $ID3v2ShortFrameNameLookup[3]['artist']                                           = 'TPE1';
       $ID3v2ShortFrameNameLookup[3]['band']                                             = 'TPE2';
       $ID3v2ShortFrameNameLookup[3]['conductor']                                        = 'TPE3';
       $ID3v2ShortFrameNameLookup[3]['remixer']                                          = 'TPE4';
       $ID3v2ShortFrameNameLookup[3]['part_of_a_set']                                    = 'TPOS';
       $ID3v2ShortFrameNameLookup[3]['publisher']                                        = 'TPUB';
       $ID3v2ShortFrameNameLookup[3]['tracknumber']                                      = 'TRCK';
       $ID3v2ShortFrameNameLookup[3]['internet_radio_station_name']                      = 'TRSN';
       $ID3v2ShortFrameNameLookup[3]['internet_radio_station_owner']                     = 'TRSO';
       $ID3v2ShortFrameNameLookup[3]['isrc']                                             = 'TSRC';
       $ID3v2ShortFrameNameLookup[3]['encoder_settings']                                 = 'TSSE';
       $ID3v2ShortFrameNameLookup[3]['user_text']                                        = 'TXXX';
       $ID3v2ShortFrameNameLookup[3]['unique_file_identifier']                           = 'UFID';
       $ID3v2ShortFrameNameLookup[3]['terms_of_use']                                     = 'USER';
       $ID3v2ShortFrameNameLookup[3]['unsynchronised_lyrics']                            = 'USLT';
       $ID3v2ShortFrameNameLookup[3]['commercial']                                       = 'WCOM';
       $ID3v2ShortFrameNameLookup[3]['copyright_information']                            = 'WCOP';
       $ID3v2ShortFrameNameLookup[3]['url_file']                                         = 'WOAF';
       $ID3v2ShortFrameNameLookup[3]['url_artist']                                       = 'WOAR';
       $ID3v2ShortFrameNameLookup[3]['url_source']                                       = 'WOAS';
       $ID3v2ShortFrameNameLookup[3]['url_station']                                      = 'WORS';
       $ID3v2ShortFrameNameLookup[3]['payment']                                          = 'WPAY';
       $ID3v2ShortFrameNameLookup[3]['url_publisher']                                    = 'WPUB';
       $ID3v2ShortFrameNameLookup[3]['url_user']                                         = 'WXXX';
 
       // The above are common to ID3v2.3 and ID3v2.4
       // so copy them to ID3v2.4 before adding specifics for 2.3 and 2.4
       $ID3v2ShortFrameNameLookup[4] = $ID3v2ShortFrameNameLookup[3];
 
       // The following are unique to ID3v2.3
       $ID3v2ShortFrameNameLookup[3]['equalisation']                                     = 'EQUA';
       $ID3v2ShortFrameNameLookup[3]['involved_people_list']                             = 'IPLS';
       $ID3v2ShortFrameNameLookup[3]['relative_volume_adjustment']                       = 'RVAD';
       $ID3v2ShortFrameNameLookup[3]['date']                                             = 'TDAT';
       $ID3v2ShortFrameNameLookup[3]['time']                                             = 'TIME';
       $ID3v2ShortFrameNameLookup[3]['original_release_year']                            = 'TORY';
       $ID3v2ShortFrameNameLookup[3]['recording_dates']                                  = 'TRDA';
       $ID3v2ShortFrameNameLookup[3]['size']                                             = 'TSIZ';
       $ID3v2ShortFrameNameLookup[3]['year']                                             = 'TYER';
 
 
       // The following are unique to ID3v2.4
       $ID3v2ShortFrameNameLookup[4]['audio_seek_point_index']                           = 'ASPI';
       $ID3v2ShortFrameNameLookup[4]['equalisation']                                     = 'EQU2';
       $ID3v2ShortFrameNameLookup[4]['relative_volume_adjustment']                       = 'RVA2';
       $ID3v2ShortFrameNameLookup[4]['seek']                                             = 'SEEK';
       $ID3v2ShortFrameNameLookup[4]['signature']                                        = 'SIGN';
       $ID3v2ShortFrameNameLookup[4]['encoding_time']                                    = 'TDEN';
       $ID3v2ShortFrameNameLookup[4]['original_release_time']                            = 'TDOR';
       $ID3v2ShortFrameNameLookup[4]['recording_time']                                   = 'TDRC';
       $ID3v2ShortFrameNameLookup[4]['release_time']                                     = 'TDRL';
       $ID3v2ShortFrameNameLookup[4]['tagging_time']                                     = 'TDTG';
       $ID3v2ShortFrameNameLookup[4]['involved_people_list']                             = 'TIPL';
       $ID3v2ShortFrameNameLookup[4]['musician_credits_list']                            = 'TMCL';
       $ID3v2ShortFrameNameLookup[4]['mood']                                             = 'TMOO';
       $ID3v2ShortFrameNameLookup[4]['produced_notice']                                  = 'TPRO';
       $ID3v2ShortFrameNameLookup[4]['album_sort_order']                                 = 'TSOA';
       $ID3v2ShortFrameNameLookup[4]['performer_sort_order']                             = 'TSOP';
       $ID3v2ShortFrameNameLookup[4]['title_sort_order']                                 = 'TSOT';
       $ID3v2ShortFrameNameLookup[4]['set_subtitle']                                     = 'TSST';
     }
     return (isset($ID3v2ShortFrameNameLookup[$majorversion][strtolower($long_description)]) ? $ID3v2ShortFrameNameLookup[$majorversion][strtolower($long_description)] : '');
 
   }
 
 }