File indexing completed on 2024-05-12 17:25:54

 <?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       //
 /////////////////////////////////////////////////////////////////
 //                                                             //
 // getid3.lib.php - part of getID3()                           //
 // See readme.txt for more details                             //
 //                                                            ///
 /////////////////////////////////////////////////////////////////
 
 
 class getid3_lib
 {
 
   public static function PrintHexBytes($string, $hex=true, $spaces=true, $htmlencoding='UTF-8') {
     $returnstring = '';
     for ($i = 0; $i < strlen($string); $i++) {
       if ($hex) {
         $returnstring .= str_pad(dechex(ord($string{$i})), 2, '0', STR_PAD_LEFT);
       } else {
         $returnstring .= ' '.(preg_match("#[\x20-\x7E]#", $string{$i}) ? $string{$i} : '¤');
       }
       if ($spaces) {
         $returnstring .= ' ';
       }
     }
     if (!empty($htmlencoding)) {
       if ($htmlencoding === true) {
         $htmlencoding = 'UTF-8'; // prior to getID3 v1.9.0 the function's 4th parameter was boolean
       }
       $returnstring = htmlentities($returnstring, ENT_QUOTES, $htmlencoding);
     }
     return $returnstring;
   }
 
   public static function trunc($floatnumber) {
     // truncates a floating-point number at the decimal point
     // returns int (if possible, otherwise float)
     if ($floatnumber >= 1) {
       $truncatednumber = floor($floatnumber);
     } elseif ($floatnumber <= -1) {
       $truncatednumber = ceil($floatnumber);
     } else {
       $truncatednumber = 0;
     }
     if (self::intValueSupported($truncatednumber)) {
       $truncatednumber = (int) $truncatednumber;
     }
     return $truncatednumber;
   }
 
 
   public static function safe_inc(&$variable, $increment=1) {
     if (isset($variable)) {
       $variable += $increment;
     } else {
       $variable = $increment;
     }
     return true;
   }
 
   public static function CastAsInt($floatnum) {
     // convert to float if not already
     $floatnum = (float) $floatnum;
 
     // convert a float to type int, only if possible
     if (self::trunc($floatnum) == $floatnum) {
       // it's not floating point
       if (self::intValueSupported($floatnum)) {
         // it's within int range
         $floatnum = (int) $floatnum;
       }
     }
     return $floatnum;
   }
 
   public static function intValueSupported($num) {
     // check if integers are 64-bit
     static $hasINT64 = null;
     if ($hasINT64 === null) { // 10x faster than is_null()
       $hasINT64 = is_int(pow(2, 31)); // 32-bit int are limited to (2^31)-1
       if (!$hasINT64 && !defined('PHP_INT_MIN')) {
         define('PHP_INT_MIN', ~PHP_INT_MAX);
       }
     }
     // if integers are 64-bit - no other check required
     if ($hasINT64 || (($num <= PHP_INT_MAX) && ($num >= PHP_INT_MIN))) {
       return true;
     }
     return false;
   }
 
   public static function DecimalizeFraction($fraction) {
     list($numerator, $denominator) = explode('/', $fraction);
     return $numerator / ($denominator ? $denominator : 1);
   }
 
 
   public static function DecimalBinary2Float($binarynumerator) {
     $numerator   = self::Bin2Dec($binarynumerator);
     $denominator = self::Bin2Dec('1'.str_repeat('0', strlen($binarynumerator)));
     return ($numerator / $denominator);
   }
 
 
   public static function NormalizeBinaryPoint($binarypointnumber, $maxbits=52) {
     // http://www.scri.fsu.edu/~jac/MAD3401/Backgrnd/binary.html
     if (strpos($binarypointnumber, '.') === false) {
       $binarypointnumber = '0.'.$binarypointnumber;
     } elseif ($binarypointnumber{0} == '.') {
       $binarypointnumber = '0'.$binarypointnumber;
     }
     $exponent = 0;
     while (($binarypointnumber{0} != '1') || (substr($binarypointnumber, 1, 1) != '.')) {
       if (substr($binarypointnumber, 1, 1) == '.') {
         $exponent--;
         $binarypointnumber = substr($binarypointnumber, 2, 1).'.'.substr($binarypointnumber, 3);
       } else {
         $pointpos = strpos($binarypointnumber, '.');
         $exponent += ($pointpos - 1);
         $binarypointnumber = str_replace('.', '', $binarypointnumber);
         $binarypointnumber = $binarypointnumber{0}.'.'.substr($binarypointnumber, 1);
       }
     }
     $binarypointnumber = str_pad(substr($binarypointnumber, 0, $maxbits + 2), $maxbits + 2, '0', STR_PAD_RIGHT);
     return array('normalized'=>$binarypointnumber, 'exponent'=>(int) $exponent);
   }
 
 
   public static function Float2BinaryDecimal($floatvalue) {
     // http://www.scri.fsu.edu/~jac/MAD3401/Backgrnd/binary.html
     $maxbits = 128; // to how many bits of precision should the calculations be taken?
     $intpart   = self::trunc($floatvalue);
     $floatpart = abs($floatvalue - $intpart);
     $pointbitstring = '';
     while (($floatpart != 0) && (strlen($pointbitstring) < $maxbits)) {
       $floatpart *= 2;
       $pointbitstring .= (string) self::trunc($floatpart);
       $floatpart -= self::trunc($floatpart);
     }
     $binarypointnumber = decbin($intpart).'.'.$pointbitstring;
     return $binarypointnumber;
   }
 
 
   public static function Float2String($floatvalue, $bits) {
     // http://www.scri.fsu.edu/~jac/MAD3401/Backgrnd/ieee-expl.html
     switch ($bits) {
       case 32:
         $exponentbits = 8;
         $fractionbits = 23;
         break;
 
       case 64:
         $exponentbits = 11;
         $fractionbits = 52;
         break;
 
       default:
         return false;
         break;
     }
     if ($floatvalue >= 0) {
       $signbit = '0';
     } else {
       $signbit = '1';
     }
     $normalizedbinary  = self::NormalizeBinaryPoint(self::Float2BinaryDecimal($floatvalue), $fractionbits);
     $biasedexponent    = pow(2, $exponentbits - 1) - 1 + $normalizedbinary['exponent']; // (127 or 1023) +/- exponent
     $exponentbitstring = str_pad(decbin($biasedexponent), $exponentbits, '0', STR_PAD_LEFT);
     $fractionbitstring = str_pad(substr($normalizedbinary['normalized'], 2), $fractionbits, '0', STR_PAD_RIGHT);
 
     return self::BigEndian2String(self::Bin2Dec($signbit.$exponentbitstring.$fractionbitstring), $bits % 8, false);
   }
 
 
   public static function LittleEndian2Float($byteword) {
     return self::BigEndian2Float(strrev($byteword));
   }
 
 
   public static function BigEndian2Float($byteword) {
     // ANSI/IEEE Standard 754-1985, Standard for Binary Floating Point Arithmetic
     // http://www.psc.edu/general/software/packages/ieee/ieee.html
     // http://www.scri.fsu.edu/~jac/MAD3401/Backgrnd/ieee.html
 
     $bitword = self::BigEndian2Bin($byteword);
     if (!$bitword) {
       return 0;
     }
     $signbit = $bitword{0};
 
     switch (strlen($byteword) * 8) {
       case 32:
         $exponentbits = 8;
         $fractionbits = 23;
         break;
 
       case 64:
         $exponentbits = 11;
         $fractionbits = 52;
         break;
 
       case 80:
         // 80-bit Apple SANE format
         // http://www.mactech.com/articles/mactech/Vol.06/06.01/SANENormalized/
         $exponentstring = substr($bitword, 1, 15);
         $isnormalized = intval($bitword{16});
         $fractionstring = substr($bitword, 17, 63);
         $exponent = pow(2, self::Bin2Dec($exponentstring) - 16383);
         $fraction = $isnormalized + self::DecimalBinary2Float($fractionstring);
         $floatvalue = $exponent * $fraction;
         if ($signbit == '1') {
           $floatvalue *= -1;
         }
         return $floatvalue;
         break;
 
       default:
         return false;
         break;
     }
     $exponentstring = substr($bitword, 1, $exponentbits);
     $fractionstring = substr($bitword, $exponentbits + 1, $fractionbits);
     $exponent = self::Bin2Dec($exponentstring);
     $fraction = self::Bin2Dec($fractionstring);
 
     if (($exponent == (pow(2, $exponentbits) - 1)) && ($fraction != 0)) {
       // Not a Number
       $floatvalue = false;
     } elseif (($exponent == (pow(2, $exponentbits) - 1)) && ($fraction == 0)) {
       if ($signbit == '1') {
         $floatvalue = '-infinity';
       } else {
         $floatvalue = '+infinity';
       }
     } elseif (($exponent == 0) && ($fraction == 0)) {
       if ($signbit == '1') {
         $floatvalue = -0;
       } else {
         $floatvalue = 0;
       }
       $floatvalue = ($signbit ? 0 : -0);
     } elseif (($exponent == 0) && ($fraction != 0)) {
       // These are 'unnormalized' values
       $floatvalue = pow(2, (-1 * (pow(2, $exponentbits - 1) - 2))) * self::DecimalBinary2Float($fractionstring);
       if ($signbit == '1') {
         $floatvalue *= -1;
       }
     } elseif ($exponent != 0) {
       $floatvalue = pow(2, ($exponent - (pow(2, $exponentbits - 1) - 1))) * (1 + self::DecimalBinary2Float($fractionstring));
       if ($signbit == '1') {
         $floatvalue *= -1;
       }
     }
     return (float) $floatvalue;
   }
 
 
   public static function BigEndian2Int($byteword, $synchsafe=false, $signed=false) {
     $intvalue = 0;
     $bytewordlen = strlen($byteword);
     if ($bytewordlen == 0) {
       return false;
     }
     for ($i = 0; $i < $bytewordlen; $i++) {
       if ($synchsafe) { // disregard MSB, effectively 7-bit bytes
         //$intvalue = $intvalue | (ord($byteword{$i}) & 0x7F) << (($bytewordlen - 1 - $i) * 7); // faster, but runs into problems past 2^31 on 32-bit systems
         $intvalue += (ord($byteword{$i}) & 0x7F) * pow(2, ($bytewordlen - 1 - $i) * 7);
       } else {
         $intvalue += ord($byteword{$i}) * pow(256, ($bytewordlen - 1 - $i));
       }
     }
     if ($signed && !$synchsafe) {
       // synchsafe ints are not allowed to be signed
       if ($bytewordlen <= PHP_INT_SIZE) {
         $signMaskBit = 0x80 << (8 * ($bytewordlen - 1));
         if ($intvalue & $signMaskBit) {
           $intvalue = 0 - ($intvalue & ($signMaskBit - 1));
         }
       } else {
         throw new Exception('ERROR: Cannot have signed integers larger than '.(8 * PHP_INT_SIZE).'-bits ('.strlen($byteword).') in self::BigEndian2Int()');
       }
     }
     return self::CastAsInt($intvalue);
   }
 
 
   public static function LittleEndian2Int($byteword, $signed=false) {
     return self::BigEndian2Int(strrev($byteword), false, $signed);
   }
 
 
   public static function BigEndian2Bin($byteword) {
     $binvalue = '';
     $bytewordlen = strlen($byteword);
     for ($i = 0; $i < $bytewordlen; $i++) {
       $binvalue .= str_pad(decbin(ord($byteword{$i})), 8, '0', STR_PAD_LEFT);
     }
     return $binvalue;
   }
 
 
   public static function BigEndian2String($number, $minbytes=1, $synchsafe=false, $signed=false) {
     if ($number < 0) {
       throw new Exception('ERROR: self::BigEndian2String() does not support negative numbers');
     }
     $maskbyte = (($synchsafe || $signed) ? 0x7F : 0xFF);
     $intstring = '';
     if ($signed) {
       if ($minbytes > PHP_INT_SIZE) {
         throw new Exception('ERROR: Cannot have signed integers larger than '.(8 * PHP_INT_SIZE).'-bits in self::BigEndian2String()');
       }
       $number = $number & (0x80 << (8 * ($minbytes - 1)));
     }
     while ($number != 0) {
       $quotient = ($number / ($maskbyte + 1));
       $intstring = chr(ceil(($quotient - floor($quotient)) * $maskbyte)).$intstring;
       $number = floor($quotient);
     }
     return str_pad($intstring, $minbytes, "\x00", STR_PAD_LEFT);
   }
 
 
   public static function Dec2Bin($number) {
     while ($number >= 256) {
       $bytes[] = (($number / 256) - (floor($number / 256))) * 256;
       $number = floor($number / 256);
     }
     $bytes[] = $number;
     $binstring = '';
     for ($i = 0; $i < count($bytes); $i++) {
       $binstring = (($i == count($bytes) - 1) ? decbin($bytes[$i]) : str_pad(decbin($bytes[$i]), 8, '0', STR_PAD_LEFT)).$binstring;
     }
     return $binstring;
   }
 
 
   public static function Bin2Dec($binstring, $signed=false) {
     $signmult = 1;
     if ($signed) {
       if ($binstring{0} == '1') {
         $signmult = -1;
       }
       $binstring = substr($binstring, 1);
     }
     $decvalue = 0;
     for ($i = 0; $i < strlen($binstring); $i++) {
       $decvalue += ((int) substr($binstring, strlen($binstring) - $i - 1, 1)) * pow(2, $i);
     }
     return self::CastAsInt($decvalue * $signmult);
   }
 
 
   public static function Bin2String($binstring) {
     // return 'hi' for input of '0110100001101001'
     $string = '';
     $binstringreversed = strrev($binstring);
     for ($i = 0; $i < strlen($binstringreversed); $i += 8) {
       $string = chr(self::Bin2Dec(strrev(substr($binstringreversed, $i, 8)))).$string;
     }
     return $string;
   }
 
 
   public static function LittleEndian2String($number, $minbytes=1, $synchsafe=false) {
     $intstring = '';
     while ($number > 0) {
       if ($synchsafe) {
         $intstring = $intstring.chr($number & 127);
         $number >>= 7;
       } else {
         $intstring = $intstring.chr($number & 255);
         $number >>= 8;
       }
     }
     return str_pad($intstring, $minbytes, "\x00", STR_PAD_RIGHT);
   }
 
 
   public static function array_merge_clobber($array1, $array2) {
     // written by kcØhireability*com
     // taken from http://www.php.net/manual/en/function.array-merge-recursive.php
     if (!is_array($array1) || !is_array($array2)) {
       return false;
     }
     $newarray = $array1;
     foreach ($array2 as $key => $val) {
       if (is_array($val) && isset($newarray[$key]) && is_array($newarray[$key])) {
         $newarray[$key] = self::array_merge_clobber($newarray[$key], $val);
       } else {
         $newarray[$key] = $val;
       }
     }
     return $newarray;
   }
 
 
   public static function array_merge_noclobber($array1, $array2) {
     if (!is_array($array1) || !is_array($array2)) {
       return false;
     }
     $newarray = $array1;
     foreach ($array2 as $key => $val) {
       if (is_array($val) && isset($newarray[$key]) && is_array($newarray[$key])) {
         $newarray[$key] = self::array_merge_noclobber($newarray[$key], $val);
       } elseif (!isset($newarray[$key])) {
         $newarray[$key] = $val;
       }
     }
     return $newarray;
   }
 
 
   public static function ksort_recursive(&$theArray) {
     ksort($theArray);
     foreach ($theArray as $key => $value) {
       if (is_array($value)) {
         self::ksort_recursive($theArray[$key]);
       }
     }
     return true;
   }
 
   public static function fileextension($filename, $numextensions=1) {
     if (strstr($filename, '.')) {
       $reversedfilename = strrev($filename);
       $offset = 0;
       for ($i = 0; $i < $numextensions; $i++) {
         $offset = strpos($reversedfilename, '.', $offset + 1);
         if ($offset === false) {
           return '';
         }
       }
       return strrev(substr($reversedfilename, 0, $offset));
     }
     return '';
   }
 
 
   public static function PlaytimeString($seconds) {
     $sign = (($seconds < 0) ? '-' : '');
     $seconds = round(abs($seconds));
     $H = (int) floor( $seconds                            / 3600);
     $M = (int) floor(($seconds - (3600 * $H)            ) /   60);
     $S = (int) round( $seconds - (3600 * $H) - (60 * $M)        );
     return $sign.($H ? $H.':' : '').($H ? str_pad($M, 2, '0', STR_PAD_LEFT) : intval($M)).':'.str_pad($S, 2, 0, STR_PAD_LEFT);
   }
 
 
   public static function DateMac2Unix($macdate) {
     // Macintosh timestamp: seconds since 00:00h January 1, 1904
     // UNIX timestamp:      seconds since 00:00h January 1, 1970
     return self::CastAsInt($macdate - 2082844800);
   }
 
 
   public static function FixedPoint8_8($rawdata) {
     return self::BigEndian2Int(substr($rawdata, 0, 1)) + (float) (self::BigEndian2Int(substr($rawdata, 1, 1)) / pow(2, 8));
   }
 
 
   public static function FixedPoint16_16($rawdata) {
     return self::BigEndian2Int(substr($rawdata, 0, 2)) + (float) (self::BigEndian2Int(substr($rawdata, 2, 2)) / pow(2, 16));
   }
 
 
   public static function FixedPoint2_30($rawdata) {
     $binarystring = self::BigEndian2Bin($rawdata);
     return self::Bin2Dec(substr($binarystring, 0, 2)) + (float) (self::Bin2Dec(substr($binarystring, 2, 30)) / pow(2, 30));
   }
 
 
   public static function CreateDeepArray($ArrayPath, $Separator, $Value) {
     // assigns $Value to a nested array path:
     //   $foo = self::CreateDeepArray('/path/to/my', '/', 'file.txt')
     // is the same as:
     //   $foo = array('path'=>array('to'=>'array('my'=>array('file.txt'))));
     // or
     //   $foo['path']['to']['my'] = 'file.txt';
     $ArrayPath = ltrim($ArrayPath, $Separator);
     if (($pos = strpos($ArrayPath, $Separator)) !== false) {
       $ReturnedArray[substr($ArrayPath, 0, $pos)] = self::CreateDeepArray(substr($ArrayPath, $pos + 1), $Separator, $Value);
     } else {
       $ReturnedArray[$ArrayPath] = $Value;
     }
     return $ReturnedArray;
   }
 
   public static function array_max($arraydata, $returnkey=false) {
     $maxvalue = false;
     $maxkey = false;
     foreach ($arraydata as $key => $value) {
       if (!is_array($value)) {
         if ($value > $maxvalue) {
           $maxvalue = $value;
           $maxkey = $key;
         }
       }
     }
     return ($returnkey ? $maxkey : $maxvalue);
   }
 
   public static function array_min($arraydata, $returnkey=false) {
     $minvalue = false;
     $minkey = false;
     foreach ($arraydata as $key => $value) {
       if (!is_array($value)) {
         if ($value > $minvalue) {
           $minvalue = $value;
           $minkey = $key;
         }
       }
     }
     return ($returnkey ? $minkey : $minvalue);
   }
 
   public static function XML2array($XMLstring) {
     if (function_exists('simplexml_load_string')) {
       if (function_exists('get_object_vars')) {
         if (function_exists('libxml_disable_entity_loader')) { // (PHP 5 >= 5.2.11)
           // http://websec.io/2012/08/27/Preventing-XEE-in-PHP.html
           libxml_disable_entity_loader(true);
         }
         $XMLobject = simplexml_load_string($XMLstring);
         return self::SimpleXMLelement2array($XMLobject);
       }
     }
     return false;
   }
 
   public static function SimpleXMLelement2array($XMLobject) {
     if (!is_object($XMLobject) && !is_array($XMLobject)) {
       return $XMLobject;
     }
     $XMLarray = (is_object($XMLobject) ? get_object_vars($XMLobject) : $XMLobject);
     foreach ($XMLarray as $key => $value) {
       $XMLarray[$key] = self::SimpleXMLelement2array($value);
     }
     return $XMLarray;
   }
 
 
   // Allan Hansen <ahØartemis*dk>
   // self::md5_data() - returns md5sum for a file from startuing position to absolute end position
   public static function hash_data($file, $offset, $end, $algorithm) {
     static $tempdir = '';
     if (!self::intValueSupported($end)) {
       return false;
     }
     switch ($algorithm) {
       case 'md5':
         $hash_function = 'md5_file';
         $unix_call     = 'md5sum';
         $windows_call  = 'md5sum.exe';
         $hash_length   = 32;
         break;
 
       case 'sha1':
         $hash_function = 'sha1_file';
         $unix_call     = 'sha1sum';
         $windows_call  = 'sha1sum.exe';
         $hash_length   = 40;
         break;
 
       default:
         throw new Exception('Invalid algorithm ('.$algorithm.') in self::hash_data()');
         break;
     }
     $size = $end - $offset;
     while (true) {
       if (GETID3_OS_ISWINDOWS) {
 
         // It seems that sha1sum.exe for Windows only works on physical files, does not accept piped data
         // Fall back to create-temp-file method:
         if ($algorithm == 'sha1') {
           break;
         }
 
         $RequiredFiles = array('cygwin1.dll', 'head.exe', 'tail.exe', $windows_call);
         foreach ($RequiredFiles as $required_file) {
           if (!is_readable(GETID3_HELPERAPPSDIR.$required_file)) {
             // helper apps not available - fall back to old method
             break 2;
           }
         }
         $commandline  = GETID3_HELPERAPPSDIR.'head.exe -c '.$end.' '.escapeshellarg(str_replace('/', DIRECTORY_SEPARATOR, $file)).' | ';
         $commandline .= GETID3_HELPERAPPSDIR.'tail.exe -c '.$size.' | ';
         $commandline .= GETID3_HELPERAPPSDIR.$windows_call;
 
       } else {
 
         $commandline  = 'head -c'.$end.' '.escapeshellarg($file).' | ';
         $commandline .= 'tail -c'.$size.' | ';
         $commandline .= $unix_call;
 
       }
       if (preg_match('#(1|ON)#i', ini_get('safe_mode'))) {
         //throw new Exception('PHP running in Safe Mode - backtick operator not available, using slower non-system-call '.$algorithm.' algorithm');
         break;
       }
       return substr(`$commandline`, 0, $hash_length);
     }
 
     if (empty($tempdir)) {
       // yes this is ugly, feel free to suggest a better way
       require_once(dirname(__FILE__).'/getid3.php');
       $getid3_temp = new getID3();
       $tempdir = $getid3_temp->tempdir;
       unset($getid3_temp);
     }
     // try to create a temporary file in the system temp directory - invalid dirname should force to system temp dir
     if (($data_filename = tempnam($tempdir, 'gI3')) === false) {
       // can't find anywhere to create a temp file, just fail
       return false;
     }
 
     // Init
     $result = false;
 
     // copy parts of file
     try {
       self::CopyFileParts($file, $data_filename, $offset, $end - $offset);
       $result = $hash_function($data_filename);
     } catch (Exception $e) {
       throw new Exception('self::CopyFileParts() failed in getid_lib::hash_data(): '.$e->getMessage());
     }
     unlink($data_filename);
     return $result;
   }
 
   public static function CopyFileParts($filename_source, $filename_dest, $offset, $length) {
     if (!self::intValueSupported($offset + $length)) {
       throw new Exception('cannot copy file portion, it extends beyond the '.round(PHP_INT_MAX / 1073741824).'GB limit');
     }
     if (is_readable($filename_source) && is_file($filename_source) && ($fp_src = fopen($filename_source, 'rb'))) {
       if (($fp_dest = fopen($filename_dest, 'wb'))) {
         if (fseek($fp_src, $offset) == 0) {
           $byteslefttowrite = $length;
           while (($byteslefttowrite > 0) && ($buffer = fread($fp_src, min($byteslefttowrite, getID3::FREAD_BUFFER_SIZE)))) {
             $byteswritten = fwrite($fp_dest, $buffer, $byteslefttowrite);
             $byteslefttowrite -= $byteswritten;
           }
           return true;
         } else {
           throw new Exception('failed to seek to offset '.$offset.' in '.$filename_source);
         }
         fclose($fp_dest);
       } else {
         throw new Exception('failed to create file for writing '.$filename_dest);
       }
       fclose($fp_src);
     } else {
       throw new Exception('failed to open file for reading '.$filename_source);
     }
     return false;
   }
 
   public static function iconv_fallback_int_utf8($charval) {
     if ($charval < 128) {
       // 0bbbbbbb
       $newcharstring = chr($charval);
     } elseif ($charval < 2048) {
       // 110bbbbb 10bbbbbb
       $newcharstring  = chr(($charval >>   6) | 0xC0);
       $newcharstring .= chr(($charval & 0x3F) | 0x80);
     } elseif ($charval < 65536) {
       // 1110bbbb 10bbbbbb 10bbbbbb
       $newcharstring  = chr(($charval >>  12) | 0xE0);
       $newcharstring .= chr(($charval >>   6) | 0xC0);
       $newcharstring .= chr(($charval & 0x3F) | 0x80);
     } else {
       // 11110bbb 10bbbbbb 10bbbbbb 10bbbbbb
       $newcharstring  = chr(($charval >>  18) | 0xF0);
       $newcharstring .= chr(($charval >>  12) | 0xC0);
       $newcharstring .= chr(($charval >>   6) | 0xC0);
       $newcharstring .= chr(($charval & 0x3F) | 0x80);
     }
     return $newcharstring;
   }
 
   // ISO-8859-1 => UTF-8
   public static function iconv_fallback_iso88591_utf8($string, $bom=false) {
     if (function_exists('utf8_encode')) {
       return utf8_encode($string);
     }
     // utf8_encode() unavailable, use getID3()'s iconv_fallback() conversions (possibly PHP is compiled without XML support)
     $newcharstring = '';
     if ($bom) {
       $newcharstring .= "\xEF\xBB\xBF";
     }
     for ($i = 0; $i < strlen($string); $i++) {
       $charval = ord($string{$i});
       $newcharstring .= self::iconv_fallback_int_utf8($charval);
     }
     return $newcharstring;
   }
 
   // ISO-8859-1 => UTF-16BE
   public static function iconv_fallback_iso88591_utf16be($string, $bom=false) {
     $newcharstring = '';
     if ($bom) {
       $newcharstring .= "\xFE\xFF";
     }
     for ($i = 0; $i < strlen($string); $i++) {
       $newcharstring .= "\x00".$string{$i};
     }
     return $newcharstring;
   }
 
   // ISO-8859-1 => UTF-16LE
   public static function iconv_fallback_iso88591_utf16le($string, $bom=false) {
     $newcharstring = '';
     if ($bom) {
       $newcharstring .= "\xFF\xFE";
     }
     for ($i = 0; $i < strlen($string); $i++) {
       $newcharstring .= $string{$i}."\x00";
     }
     return $newcharstring;
   }
 
   // ISO-8859-1 => UTF-16LE (BOM)
   public static function iconv_fallback_iso88591_utf16($string) {
     return self::iconv_fallback_iso88591_utf16le($string, true);
   }
 
   // UTF-8 => ISO-8859-1
   public static function iconv_fallback_utf8_iso88591($string) {
     if (function_exists('utf8_decode')) {
       return utf8_decode($string);
     }
     // utf8_decode() unavailable, use getID3()'s iconv_fallback() conversions (possibly PHP is compiled without XML support)
     $newcharstring = '';
     $offset = 0;
     $stringlength = strlen($string);
     while ($offset < $stringlength) {
       if ((ord($string{$offset}) | 0x07) == 0xF7) {
         // 11110bbb 10bbbbbb 10bbbbbb 10bbbbbb
         $charval = ((ord($string{($offset + 0)}) & 0x07) << 18) &
                ((ord($string{($offset + 1)}) & 0x3F) << 12) &
                ((ord($string{($offset + 2)}) & 0x3F) <<  6) &
               (ord($string{($offset + 3)}) & 0x3F);
         $offset += 4;
       } elseif ((ord($string{$offset}) | 0x0F) == 0xEF) {
         // 1110bbbb 10bbbbbb 10bbbbbb
         $charval = ((ord($string{($offset + 0)}) & 0x0F) << 12) &
                ((ord($string{($offset + 1)}) & 0x3F) <<  6) &
               (ord($string{($offset + 2)}) & 0x3F);
         $offset += 3;
       } elseif ((ord($string{$offset}) | 0x1F) == 0xDF) {
         // 110bbbbb 10bbbbbb
         $charval = ((ord($string{($offset + 0)}) & 0x1F) <<  6) &
               (ord($string{($offset + 1)}) & 0x3F);
         $offset += 2;
       } elseif ((ord($string{$offset}) | 0x7F) == 0x7F) {
         // 0bbbbbbb
         $charval = ord($string{$offset});
         $offset += 1;
       } else {
         // error? throw some kind of warning here?
         $charval = false;
         $offset += 1;
       }
       if ($charval !== false) {
         $newcharstring .= (($charval < 256) ? chr($charval) : '?');
       }
     }
     return $newcharstring;
   }
 
   // UTF-8 => UTF-16BE
   public static function iconv_fallback_utf8_utf16be($string, $bom=false) {
     $newcharstring = '';
     if ($bom) {
       $newcharstring .= "\xFE\xFF";
     }
     $offset = 0;
     $stringlength = strlen($string);
     while ($offset < $stringlength) {
       if ((ord($string{$offset}) | 0x07) == 0xF7) {
         // 11110bbb 10bbbbbb 10bbbbbb 10bbbbbb
         $charval = ((ord($string{($offset + 0)}) & 0x07) << 18) &
                ((ord($string{($offset + 1)}) & 0x3F) << 12) &
                ((ord($string{($offset + 2)}) & 0x3F) <<  6) &
               (ord($string{($offset + 3)}) & 0x3F);
         $offset += 4;
       } elseif ((ord($string{$offset}) | 0x0F) == 0xEF) {
         // 1110bbbb 10bbbbbb 10bbbbbb
         $charval = ((ord($string{($offset + 0)}) & 0x0F) << 12) &
                ((ord($string{($offset + 1)}) & 0x3F) <<  6) &
               (ord($string{($offset + 2)}) & 0x3F);
         $offset += 3;
       } elseif ((ord($string{$offset}) | 0x1F) == 0xDF) {
         // 110bbbbb 10bbbbbb
         $charval = ((ord($string{($offset + 0)}) & 0x1F) <<  6) &
               (ord($string{($offset + 1)}) & 0x3F);
         $offset += 2;
       } elseif ((ord($string{$offset}) | 0x7F) == 0x7F) {
         // 0bbbbbbb
         $charval = ord($string{$offset});
         $offset += 1;
       } else {
         // error? throw some kind of warning here?
         $charval = false;
         $offset += 1;
       }
       if ($charval !== false) {
         $newcharstring .= (($charval < 65536) ? self::BigEndian2String($charval, 2) : "\x00".'?');
       }
     }
     return $newcharstring;
   }
 
   // UTF-8 => UTF-16LE
   public static function iconv_fallback_utf8_utf16le($string, $bom=false) {
     $newcharstring = '';
     if ($bom) {
       $newcharstring .= "\xFF\xFE";
     }
     $offset = 0;
     $stringlength = strlen($string);
     while ($offset < $stringlength) {
       if ((ord($string{$offset}) | 0x07) == 0xF7) {
         // 11110bbb 10bbbbbb 10bbbbbb 10bbbbbb
         $charval = ((ord($string{($offset + 0)}) & 0x07) << 18) &
                ((ord($string{($offset + 1)}) & 0x3F) << 12) &
                ((ord($string{($offset + 2)}) & 0x3F) <<  6) &
               (ord($string{($offset + 3)}) & 0x3F);
         $offset += 4;
       } elseif ((ord($string{$offset}) | 0x0F) == 0xEF) {
         // 1110bbbb 10bbbbbb 10bbbbbb
         $charval = ((ord($string{($offset + 0)}) & 0x0F) << 12) &
                ((ord($string{($offset + 1)}) & 0x3F) <<  6) &
               (ord($string{($offset + 2)}) & 0x3F);
         $offset += 3;
       } elseif ((ord($string{$offset}) | 0x1F) == 0xDF) {
         // 110bbbbb 10bbbbbb
         $charval = ((ord($string{($offset + 0)}) & 0x1F) <<  6) &
               (ord($string{($offset + 1)}) & 0x3F);
         $offset += 2;
       } elseif ((ord($string{$offset}) | 0x7F) == 0x7F) {
         // 0bbbbbbb
         $charval = ord($string{$offset});
         $offset += 1;
       } else {
         // error? maybe throw some warning here?
         $charval = false;
         $offset += 1;
       }
       if ($charval !== false) {
         $newcharstring .= (($charval < 65536) ? self::LittleEndian2String($charval, 2) : '?'."\x00");
       }
     }
     return $newcharstring;
   }
 
   // UTF-8 => UTF-16LE (BOM)
   public static function iconv_fallback_utf8_utf16($string) {
     return self::iconv_fallback_utf8_utf16le($string, true);
   }
 
   // UTF-16BE => UTF-8
   public static function iconv_fallback_utf16be_utf8($string) {
     if (substr($string, 0, 2) == "\xFE\xFF") {
       // strip BOM
       $string = substr($string, 2);
     }
     $newcharstring = '';
     for ($i = 0; $i < strlen($string); $i += 2) {
       $charval = self::BigEndian2Int(substr($string, $i, 2));
       $newcharstring .= self::iconv_fallback_int_utf8($charval);
     }
     return $newcharstring;
   }
 
   // UTF-16LE => UTF-8
   public static function iconv_fallback_utf16le_utf8($string) {
     if (substr($string, 0, 2) == "\xFF\xFE") {
       // strip BOM
       $string = substr($string, 2);
     }
     $newcharstring = '';
     for ($i = 0; $i < strlen($string); $i += 2) {
       $charval = self::LittleEndian2Int(substr($string, $i, 2));
       $newcharstring .= self::iconv_fallback_int_utf8($charval);
     }
     return $newcharstring;
   }
 
   // UTF-16BE => ISO-8859-1
   public static function iconv_fallback_utf16be_iso88591($string) {
     if (substr($string, 0, 2) == "\xFE\xFF") {
       // strip BOM
       $string = substr($string, 2);
     }
     $newcharstring = '';
     for ($i = 0; $i < strlen($string); $i += 2) {
       $charval = self::BigEndian2Int(substr($string, $i, 2));
       $newcharstring .= (($charval < 256) ? chr($charval) : '?');
     }
     return $newcharstring;
   }
 
   // UTF-16LE => ISO-8859-1
   public static function iconv_fallback_utf16le_iso88591($string) {
     if (substr($string, 0, 2) == "\xFF\xFE") {
       // strip BOM
       $string = substr($string, 2);
     }
     $newcharstring = '';
     for ($i = 0; $i < strlen($string); $i += 2) {
       $charval = self::LittleEndian2Int(substr($string, $i, 2));
       $newcharstring .= (($charval < 256) ? chr($charval) : '?');
     }
     return $newcharstring;
   }
 
   // UTF-16 (BOM) => ISO-8859-1
   public static function iconv_fallback_utf16_iso88591($string) {
     $bom = substr($string, 0, 2);
     if ($bom == "\xFE\xFF") {
       return self::iconv_fallback_utf16be_iso88591(substr($string, 2));
     } elseif ($bom == "\xFF\xFE") {
       return self::iconv_fallback_utf16le_iso88591(substr($string, 2));
     }
     return $string;
   }
 
   // UTF-16 (BOM) => UTF-8
   public static function iconv_fallback_utf16_utf8($string) {
     $bom = substr($string, 0, 2);
     if ($bom == "\xFE\xFF") {
       return self::iconv_fallback_utf16be_utf8(substr($string, 2));
     } elseif ($bom == "\xFF\xFE") {
       return self::iconv_fallback_utf16le_utf8(substr($string, 2));
     }
     return $string;
   }
 
   public static function iconv_fallback($in_charset, $out_charset, $string) {
 
     if ($in_charset == $out_charset) {
       return $string;
     }
 
     // iconv() availble
     if (function_exists('iconv')) {
       if ($converted_string = @iconv($in_charset, $out_charset.'//TRANSLIT', $string)) {
         switch ($out_charset) {
           case 'ISO-8859-1':
             $converted_string = rtrim($converted_string, "\x00");
             break;
         }
         return $converted_string;
       }
 
       // iconv() may sometimes fail with "illegal character in input string" error message
       // and return an empty string, but returning the unconverted string is more useful
       return $string;
     }
 
 
     // iconv() not available
     static $ConversionFunctionList = array();
     if (empty($ConversionFunctionList)) {
       $ConversionFunctionList['ISO-8859-1']['UTF-8']    = 'iconv_fallback_iso88591_utf8';
       $ConversionFunctionList['ISO-8859-1']['UTF-16']   = 'iconv_fallback_iso88591_utf16';
       $ConversionFunctionList['ISO-8859-1']['UTF-16BE'] = 'iconv_fallback_iso88591_utf16be';
       $ConversionFunctionList['ISO-8859-1']['UTF-16LE'] = 'iconv_fallback_iso88591_utf16le';
       $ConversionFunctionList['UTF-8']['ISO-8859-1']    = 'iconv_fallback_utf8_iso88591';
       $ConversionFunctionList['UTF-8']['UTF-16']        = 'iconv_fallback_utf8_utf16';
       $ConversionFunctionList['UTF-8']['UTF-16BE']      = 'iconv_fallback_utf8_utf16be';
       $ConversionFunctionList['UTF-8']['UTF-16LE']      = 'iconv_fallback_utf8_utf16le';
       $ConversionFunctionList['UTF-16']['ISO-8859-1']   = 'iconv_fallback_utf16_iso88591';
       $ConversionFunctionList['UTF-16']['UTF-8']        = 'iconv_fallback_utf16_utf8';
       $ConversionFunctionList['UTF-16LE']['ISO-8859-1'] = 'iconv_fallback_utf16le_iso88591';
       $ConversionFunctionList['UTF-16LE']['UTF-8']      = 'iconv_fallback_utf16le_utf8';
       $ConversionFunctionList['UTF-16BE']['ISO-8859-1'] = 'iconv_fallback_utf16be_iso88591';
       $ConversionFunctionList['UTF-16BE']['UTF-8']      = 'iconv_fallback_utf16be_utf8';
     }
     if (isset($ConversionFunctionList[strtoupper($in_charset)][strtoupper($out_charset)])) {
       $ConversionFunction = $ConversionFunctionList[strtoupper($in_charset)][strtoupper($out_charset)];
       return self::$ConversionFunction($string);
     }
     throw new Exception('PHP does not have iconv() support - cannot convert from '.$in_charset.' to '.$out_charset);
   }
 
   public static function recursiveMultiByteCharString2HTML($data, $charset='ISO-8859-1') {
     if (is_string($data)) {
       return self::MultiByteCharString2HTML($data, $charset);
     } elseif (is_array($data)) {
       $return_data = array();
       foreach ($data as $key => $value) {
         $return_data[$key] = self::recursiveMultiByteCharString2HTML($value, $charset);
       }
       return $return_data;
     }
     // integer, float, objects, resources, etc
     return $data;
   }
 
   public static function MultiByteCharString2HTML($string, $charset='ISO-8859-1') {
     $string = (string) $string; // in case trying to pass a numeric (float, int) string, would otherwise return an empty string
     $HTMLstring = '';
 
     switch ($charset) {
       case '1251':
       case '1252':
       case '866':
       case '932':
       case '936':
       case '950':
       case 'BIG5':
       case 'BIG5-HKSCS':
       case 'cp1251':
       case 'cp1252':
       case 'cp866':
       case 'EUC-JP':
       case 'EUCJP':
       case 'GB2312':
       case 'ibm866':
       case 'ISO-8859-1':
       case 'ISO-8859-15':
       case 'ISO8859-1':
       case 'ISO8859-15':
       case 'KOI8-R':
       case 'koi8-ru':
       case 'koi8r':
       case 'Shift_JIS':
       case 'SJIS':
       case 'win-1251':
       case 'Windows-1251':
       case 'Windows-1252':
         $HTMLstring = htmlentities($string, ENT_COMPAT, $charset);
         break;
 
       case 'UTF-8':
         $strlen = strlen($string);
         for ($i = 0; $i < $strlen; $i++) {
           $char_ord_val = ord($string{$i});
           $charval = 0;
           if ($char_ord_val < 0x80) {
             $charval = $char_ord_val;
           } elseif ((($char_ord_val & 0xF0) >> 4) == 0x0F  &&  $i+3 < $strlen) {
             $charval  = (($char_ord_val & 0x07) << 18);
             $charval += ((ord($string{++$i}) & 0x3F) << 12);
             $charval += ((ord($string{++$i}) & 0x3F) << 6);
             $charval +=  (ord($string{++$i}) & 0x3F);
           } elseif ((($char_ord_val & 0xE0) >> 5) == 0x07  &&  $i+2 < $strlen) {
             $charval  = (($char_ord_val & 0x0F) << 12);
             $charval += ((ord($string{++$i}) & 0x3F) << 6);
             $charval +=  (ord($string{++$i}) & 0x3F);
           } elseif ((($char_ord_val & 0xC0) >> 6) == 0x03  &&  $i+1 < $strlen) {
             $charval  = (($char_ord_val & 0x1F) << 6);
             $charval += (ord($string{++$i}) & 0x3F);
           }
           if (($charval >= 32) && ($charval <= 127)) {
             $HTMLstring .= htmlentities(chr($charval));
           } else {
             $HTMLstring .= '&#'.$charval.';';
           }
         }
         break;
 
       case 'UTF-16LE':
         for ($i = 0; $i < strlen($string); $i += 2) {
           $charval = self::LittleEndian2Int(substr($string, $i, 2));
           if (($charval >= 32) && ($charval <= 127)) {
             $HTMLstring .= chr($charval);
           } else {
             $HTMLstring .= '&#'.$charval.';';
           }
         }
         break;
 
       case 'UTF-16BE':
         for ($i = 0; $i < strlen($string); $i += 2) {
           $charval = self::BigEndian2Int(substr($string, $i, 2));
           if (($charval >= 32) && ($charval <= 127)) {
             $HTMLstring .= chr($charval);
           } else {
             $HTMLstring .= '&#'.$charval.';';
           }
         }
         break;
 
       default:
         $HTMLstring = 'ERROR: Character set "'.$charset.'" not supported in MultiByteCharString2HTML()';
         break;
     }
     return $HTMLstring;
   }
 
 
 
   public static function RGADnameLookup($namecode) {
     static $RGADname = array();
     if (empty($RGADname)) {
       $RGADname[0] = 'not set';
       $RGADname[1] = 'Track Gain Adjustment';
       $RGADname[2] = 'Album Gain Adjustment';
     }
 
     return (isset($RGADname[$namecode]) ? $RGADname[$namecode] : '');
   }
 
 
   public static function RGADoriginatorLookup($originatorcode) {
     static $RGADoriginator = array();
     if (empty($RGADoriginator)) {
       $RGADoriginator[0] = 'unspecified';
       $RGADoriginator[1] = 'pre-set by artist/producer/mastering engineer';
       $RGADoriginator[2] = 'set by user';
       $RGADoriginator[3] = 'determined automatically';
     }
 
     return (isset($RGADoriginator[$originatorcode]) ? $RGADoriginator[$originatorcode] : '');
   }
 
 
   public static function RGADadjustmentLookup($rawadjustment, $signbit) {
     $adjustment = $rawadjustment / 10;
     if ($signbit == 1) {
       $adjustment *= -1;
     }
     return (float) $adjustment;
   }
 
 
   public static function RGADgainString($namecode, $originatorcode, $replaygain) {
     if ($replaygain < 0) {
       $signbit = '1';
     } else {
       $signbit = '0';
     }
     $storedreplaygain = intval(round($replaygain * 10));
     $gainstring  = str_pad(decbin($namecode), 3, '0', STR_PAD_LEFT);
     $gainstring .= str_pad(decbin($originatorcode), 3, '0', STR_PAD_LEFT);
     $gainstring .= $signbit;
     $gainstring .= str_pad(decbin($storedreplaygain), 9, '0', STR_PAD_LEFT);
 
     return $gainstring;
   }
 
   public static function RGADamplitude2dB($amplitude) {
     return 20 * log10($amplitude);
   }
 
 
   public static function GetDataImageSize($imgData, &$imageinfo=array()) {
     static $tempdir = '';
     if (empty($tempdir)) {
       // yes this is ugly, feel free to suggest a better way
       require_once(dirname(__FILE__).'/getid3.php');
       $getid3_temp = new getID3();
       $tempdir = $getid3_temp->tempdir;
       unset($getid3_temp);
     }
     $GetDataImageSize = false;
     if ($tempfilename = tempnam($tempdir, 'gI3')) {
       if (is_writable($tempfilename) && is_file($tempfilename) && ($tmp = fopen($tempfilename, 'wb'))) {
         fwrite($tmp, $imgData);
         fclose($tmp);
         $GetDataImageSize = @getimagesize($tempfilename, $imageinfo);
       }
       unlink($tempfilename);
     }
     return $GetDataImageSize;
   }
 
   public static function ImageExtFromMime($mime_type) {
     // temporary way, works OK for now, but should be reworked in the future
     return str_replace(array('image/', 'x-', 'jpeg'), array('', '', 'jpg'), $mime_type);
   }
 
   public static function ImageTypesLookup($imagetypeid) {
     static $ImageTypesLookup = array();
     if (empty($ImageTypesLookup)) {
       $ImageTypesLookup[1]  = 'gif';
       $ImageTypesLookup[2]  = 'jpeg';
       $ImageTypesLookup[3]  = 'png';
       $ImageTypesLookup[4]  = 'swf';
       $ImageTypesLookup[5]  = 'psd';
       $ImageTypesLookup[6]  = 'bmp';
       $ImageTypesLookup[7]  = 'tiff (little-endian)';
       $ImageTypesLookup[8]  = 'tiff (big-endian)';
       $ImageTypesLookup[9]  = 'jpc';
       $ImageTypesLookup[10] = 'jp2';
       $ImageTypesLookup[11] = 'jpx';
       $ImageTypesLookup[12] = 'jb2';
       $ImageTypesLookup[13] = 'swc';
       $ImageTypesLookup[14] = 'iff';
     }
     return (isset($ImageTypesLookup[$imagetypeid]) ? $ImageTypesLookup[$imagetypeid] : '');
   }
 
   public static function CopyTagsToComments(&$ThisFileInfo) {
 
     // Copy all entries from ['tags'] into common ['comments']
     if (!empty($ThisFileInfo['tags'])) {
       foreach ($ThisFileInfo['tags'] as $tagtype => $tagarray) {
         foreach ($tagarray as $tagname => $tagdata) {
           foreach ($tagdata as $key => $value) {
             if (!empty($value)) {
               if (empty($ThisFileInfo['comments'][$tagname])) {
 
                 // fall through and append value
 
               } elseif ($tagtype == 'id3v1') {
 
                 $newvaluelength = strlen(trim($value));
                 foreach ($ThisFileInfo['comments'][$tagname] as $existingkey => $existingvalue) {
                   $oldvaluelength = strlen(trim($existingvalue));
                   if (($newvaluelength <= $oldvaluelength) && (substr($existingvalue, 0, $newvaluelength) == trim($value))) {
                     // new value is identical but shorter-than (or equal-length to) one already in comments - skip
                     break 2;
                   }
                 }
 
               } elseif (!is_array($value)) {
 
                 $newvaluelength = strlen(trim($value));
                 foreach ($ThisFileInfo['comments'][$tagname] as $existingkey => $existingvalue) {
                   $oldvaluelength = strlen(trim($existingvalue));
                   if ((strlen($existingvalue) > 10) && ($newvaluelength > $oldvaluelength) && (substr(trim($value), 0, strlen($existingvalue)) == $existingvalue)) {
                     $ThisFileInfo['comments'][$tagname][$existingkey] = trim($value);
                     //break 2;
                     break;
                   }
                 }
 
               }
               if (is_array($value) || empty($ThisFileInfo['comments'][$tagname]) || !in_array(trim($value), $ThisFileInfo['comments'][$tagname])) {
                 $value = (is_string($value) ? trim($value) : $value);
                 if (!is_numeric($key)) {
                   $ThisFileInfo['comments'][$tagname][$key] = $value;
                 } else {
                   $ThisFileInfo['comments'][$tagname][]     = $value;
                 }
               }
             }
           }
         }
       }
 
       // Copy to ['comments_html']
       if (!empty($ThisFileInfo['comments'])) {
         foreach ($ThisFileInfo['comments'] as $field => $values) {
           if ($field == 'picture') {
             // pictures can take up a lot of space, and we don't need multiple copies of them
             // let there be a single copy in [comments][picture], and not elsewhere
             continue;
           }
           foreach ($values as $index => $value) {
             if (is_array($value)) {
               $ThisFileInfo['comments_html'][$field][$index] = $value;
             } else {
               $ThisFileInfo['comments_html'][$field][$index] = str_replace('&#0;', '', self::MultiByteCharString2HTML($value, $ThisFileInfo['encoding']));
             }
           }
         }
       }
 
     }
     return true;
   }
 
 
   public static function EmbeddedLookup($key, $begin, $end, $file, $name) {
 
     // Cached
     static $cache;
     if (isset($cache[$file][$name])) {
       return (isset($cache[$file][$name][$key]) ? $cache[$file][$name][$key] : '');
     }
 
     // Init
     $keylength  = strlen($key);
     $line_count = $end - $begin - 7;
 
     // Open php file
     $fp = fopen($file, 'r');
 
     // Discard $begin lines
     for ($i = 0; $i < ($begin + 3); $i++) {
       fgets($fp, 1024);
     }
 
     // Loop thru line
     while (0 < $line_count--) {
 
       // Read line
       $line = ltrim(fgets($fp, 1024), "\t ");
 
       // METHOD A: only cache the matching key - less memory but slower on next lookup of not-previously-looked-up key
       //$keycheck = substr($line, 0, $keylength);
       //if ($key == $keycheck)  {
       //  $cache[$file][$name][$keycheck] = substr($line, $keylength + 1);
       //  break;
       //}
 
       // METHOD B: cache all keys in this lookup - more memory but faster on next lookup of not-previously-looked-up key
       //$cache[$file][$name][substr($line, 0, $keylength)] = trim(substr($line, $keylength + 1));
       $explodedLine = explode("\t", $line, 2);
       $ThisKey   = (isset($explodedLine[0]) ? $explodedLine[0] : '');
       $ThisValue = (isset($explodedLine[1]) ? $explodedLine[1] : '');
       $cache[$file][$name][$ThisKey] = trim($ThisValue);
     }
 
     // Close and return
     fclose($fp);
     return (isset($cache[$file][$name][$key]) ? $cache[$file][$name][$key] : '');
   }
 
   public static function IncludeDependency($filename, $sourcefile, $DieOnFailure=false) {
     global $GETID3_ERRORARRAY;
 
     if (file_exists($filename)) {
       if (include_once($filename)) {
         return true;
       } else {
         $diemessage = basename($sourcefile).' depends on '.$filename.', which has errors';
       }
     } else {
       $diemessage = basename($sourcefile).' depends on '.$filename.', which is missing';
     }
     if ($DieOnFailure) {
       throw new Exception($diemessage);
     } else {
       $GETID3_ERRORARRAY[] = $diemessage;
     }
     return false;
   }
 
   public static function trimNullByte($string) {
     return trim($string, "\x00");
   }
 
   public static function getFileSizeSyscall($path) {
     $filesize = false;
 
     if (GETID3_OS_ISWINDOWS) {
       if (class_exists('COM')) { // From PHP 5.3.15 and 5.4.5, COM and DOTNET is no longer built into the php core.you have to add COM support in php.ini:
         $filesystem = new COM('Scripting.FileSystemObject');
         $file = $filesystem->GetFile($path);
         $filesize = $file->Size();
         unset($filesystem, $file);
       } else {
         $commandline = 'for %I in ('.escapeshellarg($path).') do @echo %~zI';
       }
     } else {
       $commandline = 'ls -l '.escapeshellarg($path).' | awk \'{print $5}\'';
     }
     if (isset($commandline)) {
       $output = trim(`$commandline`);
       if (ctype_digit($output)) {
         $filesize = (float) $output;
       }
     }
     return $filesize;
   }
 
 
   /**
   * Workaround for Bug #37268 (https://bugs.php.net/bug.php?id=37268)
   * @param string $path A path.
   * @param string $suffix If the name component ends in suffix this will also be cut off.
   * @return string
   */
   public static function mb_basename($path, $suffix = null) {
     $splited = preg_split('#/#', rtrim($path, '/ '));
     return substr(basename('X'.$splited[count($splited) - 1], $suffix), 1);
   }
 
 }