File indexing completed on 2024-12-22 05:37:17

 <?php
 /**
  * Zend Framework
  *
  * LICENSE
  *
  * This source file is subject to the new BSD license that is bundled
  * with this package in the file LICENSE.txt.
  * It is also available through the world-wide-web at this URL:
  * http://framework.zend.com/license/new-bsd
  * If you did not receive a copy of the license and are unable to
  * obtain it through the world-wide-web, please send an email
  * to license@zend.com so we can send you a copy immediately.
  *
  * @category   Zend
  * @package    Zend_Loader
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id$
  */
 
 /**
  * Static methods for loading classes and files.
  *
  * @category   Zend
  * @package    Zend_Loader
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 class Zend_Loader
 {
     /**
      * Loads a class from a PHP file.  The filename must be formatted
      * as "$class.php".
      *
      * If $dirs is a string or an array, it will search the directories
      * in the order supplied, and attempt to load the first matching file.
      *
      * If $dirs is null, it will split the class name at underscores to
      * generate a path hierarchy (e.g., "Zend_Example_Class" will map
      * to "Zend/Example/Class.php").
      *
      * If the file was not found in the $dirs, or if no $dirs were specified,
      * it will attempt to load it from PHP's include_path.
      *
      * @param string $class      - The full class name of a Zend component.
      * @param string|array $dirs - OPTIONAL Either a path or an array of paths
      *                             to search.
      * @return void
      * @throws Zend_Exception
      */
     public static function loadClass($class, $dirs = null)
     {
         if (class_exists($class, false) || interface_exists($class, false)) {
             return;
         }
 
         if ((null !== $dirs) && !is_string($dirs) && !is_array($dirs)) {
             // require_once 'Zend/Exception.php';
             throw new Zend_Exception('Directory argument must be a string or an array');
         }
 
         $file = self::standardiseFile($class);
 
         if (!empty($dirs)) {
             // use the autodiscovered path
             $dirPath = dirname($file);
             if (is_string($dirs)) {
                 $dirs = explode(PATH_SEPARATOR, $dirs);
             }
             foreach ($dirs as $key => $dir) {
                 if ($dir == '.') {
                     $dirs[$key] = $dirPath;
                 } else {
                     $dir = rtrim($dir, '\\/');
                     $dirs[$key] = $dir . DIRECTORY_SEPARATOR . $dirPath;
                 }
             }
             $file = basename($file);
             self::loadFile($file, $dirs, true);
         } else {
             self::loadFile($file, null, true);
         }
 
         if (!class_exists($class, false) && !interface_exists($class, false)) {
             // require_once 'Zend/Exception.php';
             throw new Zend_Exception("File \"$file\" does not exist or class \"$class\" was not found in the file");
         }
     }
 
     /**
      * Loads a PHP file.  This is a wrapper for PHP's include() function.
      *
      * $filename must be the complete filename, including any
      * extension such as ".php".  Note that a security check is performed that
      * does not permit extended characters in the filename.  This method is
      * intended for loading Zend Framework files.
      *
      * If $dirs is a string or an array, it will search the directories
      * in the order supplied, and attempt to load the first matching file.
      *
      * If the file was not found in the $dirs, or if no $dirs were specified,
      * it will attempt to load it from PHP's include_path.
      *
      * If $once is TRUE, it will use include_once() instead of include().
      *
      * @param  string        $filename
      * @param  string|array  $dirs - OPTIONAL either a path or array of paths
      *                       to search.
      * @param  boolean       $once
      * @return boolean
      * @throws Zend_Exception
      */
     public static function loadFile($filename, $dirs = null, $once = false)
     {
         self::_securityCheck($filename);
 
         /**
          * Search in provided directories, as well as include_path
          */
         $incPath = false;
         if (!empty($dirs) && (is_array($dirs) || is_string($dirs))) {
             if (is_array($dirs)) {
                 $dirs = implode(PATH_SEPARATOR, $dirs);
             }
             $incPath = get_include_path();
             set_include_path($dirs . PATH_SEPARATOR . $incPath);
         }
 
         /**
          * Try finding for the plain filename in the include_path.
          */
         if ($once) {
             include_once $filename;
         } else {
             include $filename;
         }
 
         /**
          * If searching in directories, reset include_path
          */
         if ($incPath) {
             set_include_path($incPath);
         }
 
         return true;
     }
 
     /**
      * Returns TRUE if the $filename is readable, or FALSE otherwise.
      * This function uses the PHP include_path, where PHP's is_readable()
      * does not.
      *
      * Note from ZF-2900:
      * If you use custom error handler, please check whether return value
      *  from error_reporting() is zero or not.
      * At mark of fopen() can not suppress warning if the handler is used.
      *
      * @param string   $filename
      * @return boolean
      */
     public static function isReadable($filename)
     {
         if (is_readable($filename)) {
             // Return early if the filename is readable without needing the
             // include_path
             return true;
         }
 
         if (strtoupper(substr(PHP_OS, 0, 3)) == 'WIN'
             && preg_match('/^[a-z]:/i', $filename)
         ) {
             // If on windows, and path provided is clearly an absolute path,
             // return false immediately
             return false;
         }
 
         foreach (self::explodeIncludePath() as $path) {
             if ($path == '.') {
                 if (is_readable($filename)) {
                     return true;
                 }
                 continue;
             }
             $file = $path . '/' . $filename;
             if (is_readable($file)) {
                 return true;
             }
         }
         return false;
     }
 
     /**
      * Explode an include path into an array
      *
      * If no path provided, uses current include_path. Works around issues that
      * occur when the path includes stream schemas.
      *
      * @param  string|null $path
      * @return array
      */
     public static function explodeIncludePath($path = null)
     {
         if (null === $path) {
             $path = get_include_path();
         }
 
         if (PATH_SEPARATOR == ':') {
             // On *nix systems, include_paths which include paths with a stream
             // schema cannot be safely explode'd, so we have to be a bit more
             // intelligent in the approach.
             $paths = preg_split('#:(?!//)#', $path);
         } else {
             $paths = explode(PATH_SEPARATOR, $path);
         }
         return $paths;
     }
 
     /**
      * spl_autoload() suitable implementation for supporting class autoloading.
      *
      * Attach to spl_autoload() using the following:
      * <code>
      * spl_autoload_register(array('Zend_Loader', 'autoload'));
      * </code>
      *
      * @deprecated Since 1.8.0
      * @param  string $class
      * @return string|false Class name on success; false on failure
      */
     public static function autoload($class)
     {
         trigger_error(__CLASS__ . '::' . __METHOD__ . ' is deprecated as of 1.8.0 and will be removed with 2.0.0; use Zend_Loader_Autoloader instead', E_USER_NOTICE);
         try {
             @self::loadClass($class);
             return $class;
         } catch (Exception $e) {
             return false;
         }
     }
 
     /**
      * Register {@link autoload()} with spl_autoload()
      *
      * @deprecated Since 1.8.0
      * @param string $class (optional)
      * @param boolean $enabled (optional)
      * @return void
      * @throws Zend_Exception if spl_autoload() is not found
      * or if the specified class does not have an autoload() method.
      */
     public static function registerAutoload($class = 'Zend_Loader', $enabled = true)
     {
         trigger_error(__CLASS__ . '::' . __METHOD__ . ' is deprecated as of 1.8.0 and will be removed with 2.0.0; use Zend_Loader_Autoloader instead', E_USER_NOTICE);
         // require_once 'Zend/Loader/Autoloader.php';
         $autoloader = Zend_Loader_Autoloader::getInstance();
         $autoloader->setFallbackAutoloader(true);
 
         if ('Zend_Loader' != $class) {
             self::loadClass($class);
             $methods = get_class_methods($class);
             if (!in_array('autoload', (array) $methods)) {
                 // require_once 'Zend/Exception.php';
                 throw new Zend_Exception("The class \"$class\" does not have an autoload() method");
             }
 
             $callback = array($class, 'autoload');
 
             if ($enabled) {
                 $autoloader->pushAutoloader($callback);
             } else {
                 $autoloader->removeAutoloader($callback);
             }
         }
     }
 
     /**
      * Ensure that filename does not contain exploits
      *
      * @param  string $filename
      * @return void
      * @throws Zend_Exception
      */
     protected static function _securityCheck($filename)
     {
         /**
          * Security check
          */
         if (preg_match('/[^a-z0-9\\/\\\\_.:-]/i', $filename)) {
             // require_once 'Zend/Exception.php';
             throw new Zend_Exception('Security check: Illegal character in filename');
         }
     }
 
     /**
      * Attempt to include() the file.
      *
      * include() is not prefixed with the @ operator because if
      * the file is loaded and contains a parse error, execution
      * will halt silently and this is difficult to debug.
      *
      * Always set display_errors = Off on production servers!
      *
      * @param  string  $filespec
      * @param  boolean $once
      * @return boolean
      * @deprecated Since 1.5.0; use loadFile() instead
      */
     protected static function _includeFile($filespec, $once = false)
     {
         if ($once) {
             return include_once $filespec;
         } else {
             return include $filespec ;
         }
     }
 
     /**
      * Standardise the filename.
      *
      * Convert the supplied filename into the namespace-aware standard,
      * based on the Framework Interop Group reference implementation:
      * http://groups.google.com/group/php-standards/web/psr-0-final-proposal
      *
      * The filename must be formatted as "$file.php".
      *
      * @param string $file - The file name to be loaded.
      * @return string
      */
     public static function standardiseFile($file)
     {
         $fileName = ltrim($file, '\\');
         $file      = '';
         $namespace = '';
         if ($lastNsPos = strripos($fileName, '\\')) {
             $namespace = substr($fileName, 0, $lastNsPos);
             $fileName = substr($fileName, $lastNsPos + 1);
             $file      = str_replace('\\', DIRECTORY_SEPARATOR, $namespace) . DIRECTORY_SEPARATOR;
         }
         $file .= str_replace('_', DIRECTORY_SEPARATOR, $fileName) . '.php';
         return $file;    
     }
 }