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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: array_key_exists.php,v 1.7 2005/01/26 04:55:13 aidan Exp $

  19  
  20  
  21  /**

  22   * Replace array_key_exists()

  23   *

  24   * @category    PHP

  25   * @package     PHP_Compat

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

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

  28   * @version     $Revision: 1.7 $

  29   * @since       PHP 4.1.0

  30   * @require     PHP 4.0.0 (user_error)

  31   */
  32  if (!function_exists('array_key_exists')) {
  33      function array_key_exists($key, $search)
  34      {
  35          if (!is_scalar($key)) {
  36              user_error('array_key_exists() The first argument should be either a string or an integer',
  37                  E_USER_WARNING);
  38              return false;
  39          }
  40  
  41          if (is_object($search)) {
  42              $search = get_object_vars($search);
  43          }
  44  
  45          if (!is_array($search)) {
  46              user_error('array_key_exists() The second argument should be either an array or an object',
  47                  E_USER_WARNING);
  48              return false;
  49          }
  50  
  51          return in_array($key, array_keys($search));
  52      }
  53  }
  54  
  55  ?>