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   1  <?php
   2  // +----------------------------------------------------------------------+

   3  // | PHP Version 4                                                        |

   4  // +----------------------------------------------------------------------+

   5  // | Copyright (c) 1997-2004 The PHP Group                                |

   6  // +----------------------------------------------------------------------+

   7  // | This source file is subject to version 3.0 of the PHP license,       |

   8  // | that is bundled with this package in the file LICENSE, and is        |

   9  // | available at through the world-wide-web at                           |

  10  // | http://www.php.net/license/3_0.txt.                                  |

  11  // | If you did not receive a copy of the PHP license and are unable to   |

  12  // | obtain it through the world-wide-web, please send a note to          |

  13  // | license@php.net so we can mail you a copy immediately.               |

  14  // +----------------------------------------------------------------------+

  15  // | Authors: Aidan Lister <aidan@php.net>                                |

  16  // +----------------------------------------------------------------------+

  17  //

  18  // $Id: is_a.php,v 1.16 2005/01/26 04:55:13 aidan Exp $

  19  
  20  
  21  /**

  22   * Replace function is_a()

  23   *

  24   * @category    PHP

  25   * @package     PHP_Compat

  26   * @link        http://php.net/function.is_a

  27   * @author      Aidan Lister <aidan@php.net>

  28   * @version     $Revision: 1.16 $

  29   * @since       PHP 4.2.0

  30   * @require     PHP 4.0.0 (user_error) (is_subclass_of)

  31   */
  32  if (!function_exists('is_a')) {
  33      function is_a($object, $class)
  34      {
  35          if (!is_object($object)) {
  36              return false;
  37          }
  38  
  39          if (get_class($object) == strtolower($class)) {
  40              return true;
  41          } else {
  42              return is_subclass_of($object, $class);
  43          }
  44      }
  45  }
  46  
  47  ?>