[Summary view]

   1  <?php
   2  
   3  /**
   4   * Autoloader Class
   5   *
   6   *  PHP Version 5
   7   *
   8   * @file      CAS/Autoload.php
   9   * @category  Authentication
  10   * @package   SimpleCAS
  11   * @author    Brett Bieber <brett.bieber@gmail.com>
  12   * @copyright 2008 Regents of the University of Nebraska
  13   * @license   http://www1.unl.edu/wdn/wiki/Software_License BSD License
  14   * @link      http://code.google.com/p/simplecas/
  15   **/
  16  
  17  /**
  18   * Autoload a class
  19   *
  20   * @param string $class Classname to load
  21   *
  22   * @return bool
  23   */
  24  function CAS_autoload($class)
  25  {
  26      // Static to hold the Include Path to CAS
  27      static $include_path;
  28      // Check only for CAS classes
  29      if (substr($class, 0, 4) !== 'CAS_') {
  30          return false;
  31      }
  32      // Setup the include path if it's not already set from a previous call
  33      if (empty($include_path)) {
  34          $include_path = array(dirname(dirname(__FILE__)), dirname(dirname(__FILE__)) . '/../test/' );
  35      }
  36  
  37      // Declare local variable to store the expected full path to the file
  38  
  39      foreach ($include_path as $path) {
  40          $file_path = $path . '/' . str_replace('_', '/', $class) . '.php';
  41          $fp = @fopen($file_path, 'r', true);
  42          if ($fp) {
  43              fclose($fp);
  44              include $file_path;
  45              if (!class_exists($class, false) && !interface_exists($class, false)) {
  46                  die(
  47                      new Exception(
  48                          'Class ' . $class . ' was not present in ' .
  49                          $file_path .
  50                          ' [CAS_autoload]'
  51                      )
  52                  );
  53              }
  54              return true;
  55          }
  56      }
  57      $e = new Exception(
  58          'Class ' . $class . ' could not be loaded from ' .
  59          $file_path . ', file does not exist (Path="'
  60          . implode(':', $include_path) .'") [CAS_autoload]'
  61      );
  62      $trace = $e->getTrace();
  63      if (isset($trace[2]) && isset($trace[2]['function'])
  64          && in_array($trace[2]['function'], array('class_exists', 'interface_exists'))
  65      ) {
  66          return false;
  67      }
  68      if (isset($trace[1]) && isset($trace[1]['function'])
  69          && in_array($trace[1]['function'], array('class_exists', 'interface_exists'))
  70      ) {
  71          return false;
  72      }
  73      die ((string) $e);
  74  }
  75  
  76  // set up __autoload
  77  if (!(spl_autoload_functions())
  78      || !in_array('CAS_autoload', spl_autoload_functions())
  79  ) {
  80      spl_autoload_register('CAS_autoload');
  81      if (function_exists('__autoload')
  82          && !in_array('__autoload', spl_autoload_functions())
  83      ) {
  84          // __autoload() was being used, but now would be ignored, add
  85          // it to the autoload stack
  86          spl_autoload_register('__autoload');
  87      }
  88  }
  89  
  90  ?>