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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_diff_key.php,v 1.4 2005/01/26 04:55:13 aidan Exp $

  19  
  20  
  21  /**

  22   * Replace array_diff_key()

  23   *

  24   * @category    PHP

  25   * @package     PHP_Compat

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

  27   * @author      Tom Buskens <ortega@php.net>

  28   * @version     $Revision: 1.4 $

  29   * @since       PHP 5.0.2

  30   * @require     PHP 4.0.0 (user_error)

  31   */
  32  if (!function_exists('array_diff_key')) {
  33      function array_diff_key()
  34      {
  35          $args = func_get_args();
  36          if (count($args) < 2) {
  37              user_error('Wrong parameter count for array_diff_key()', E_USER_WARNING);
  38              return;
  39          }
  40  
  41          // Check arrays

  42          $array_count = count($args);
  43          for ($i = 0; $i !== $array_count; $i++) {
  44              if (!is_array($args[$i])) {
  45                  user_error('array_diff_key() Argument #' .
  46                      ($i + 1) . ' is not an array', E_USER_WARNING);
  47                  return;
  48              }
  49          }
  50  
  51          $result = $args[0];
  52          foreach ($args[0] as $key1 => $value1) {
  53              for ($i = 1; $i !== $array_count; $i++) {
  54                  foreach ($args[$i] as $key2 => $value2) {
  55                      if ((string) $key1 === (string) $key2) {
  56                          unset($result[$key2]);
  57                          break 2;
  58                      }
  59                  }
  60              }
  61          }
  62          return $result;
  63      }
  64  }
  65  
  66  ?>