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   1  <?php
   2  
   3  // SPDX-FileCopyrightText: 2004-2023 Ryan Parman, Sam Sneddon, Ryan McCue
   4  // SPDX-License-Identifier: BSD-3-Clause
   5  
   6  /**
   7   * PSR-4 implementation for SimplePie.
   8   *
   9   * After registering this autoload function with SPL, the following line
  10   * would cause the function to attempt to load the \SimplePie\SimplePie class
  11   * from /src/SimplePie.php:
  12   *
  13   *      new \SimplePie\SimplePie();
  14   *
  15   * @param string $class The fully-qualified class name.
  16   * @return void
  17   */
  18  spl_autoload_register(function ($class) {
  19  
  20      // project-specific namespace prefix
  21      $prefix = 'SimplePie\\';
  22  
  23      // base directory for the namespace prefix
  24      $base_dir = __DIR__ . '/src/';
  25  
  26      // does the class use the namespace prefix?
  27      $len = strlen($prefix);
  28      if (strncmp($prefix, $class, $len) !== 0) {
  29          // no, move to the next registered autoloader
  30          return;
  31      }
  32  
  33      // get the relative class name
  34      $relative_class = substr($class, $len);
  35  
  36      // replace the namespace prefix with the base directory, replace namespace
  37      // separators with directory separators in the relative class name, append
  38      // with .php
  39      $file = $base_dir . str_replace('\\', '/', $relative_class) . '.php';
  40  
  41      // if the file exists, require it
  42      if (file_exists($file)) {
  43          require $file;
  44      }
  45  });
  46  
  47  // autoloader
  48  spl_autoload_register(array(new SimplePie_Autoloader(), 'autoload'));
  49  
  50  if (!class_exists('SimplePie'))
  51  {
  52      exit('Autoloader not registered properly');
  53  }
  54  
  55  /**
  56   * Autoloader class
  57   */
  58  class SimplePie_Autoloader
  59  {
  60      protected $path;
  61  
  62      /**
  63       * Constructor
  64       */
  65  	public function __construct()
  66      {
  67          $this->path = dirname(__FILE__) . DIRECTORY_SEPARATOR . 'library';
  68      }
  69  
  70      /**
  71       * Autoloader
  72       *
  73       * @param string $class The name of the class to attempt to load.
  74       */
  75  	public function autoload($class)
  76      {
  77          // Only load the class if it starts with "SimplePie"
  78          if (strpos($class, 'SimplePie') !== 0)
  79          {
  80              return;
  81          }
  82  
  83          $filename = $this->path . DIRECTORY_SEPARATOR . str_replace('_', DIRECTORY_SEPARATOR, $class) . '.php';
  84          include $filename;
  85      }
  86  }