[Sommaire] [Imprimer]

   1  <?php
   2  /*
   3  + ----------------------------------------------------------------------------+
   4  |     e107 website system
   5  |
   6  |     ©Steve Dunstan 2001-2002
   7  |     http://e107.org
   8  |     jalist@e107.org
   9  |
  10  |     Released under the terms and conditions of the
  11  |     GNU General Public License (http://gnu.org).
  12  |
  13  |     $Source: /cvsroot/e107/e107_0.7/e107_handlers/override_class.php,v $
  14  |     $Revision: 1.6 $
  15  |     $Date: 2006/10/06 23:43:03 $
  16  |     $Author: mrpete $
  17  +----------------------------------------------------------------------------+
  18  */
  19      
  20  if (!defined('e107_INIT')) { exit; }
  21  
  22  /*
  23   * USAGE
  24   * In user code, to override an existing function...
  25   *
  26   * $override->override_function('original_func_name','mynew_function_name',['optional_include_file_from_root']);
  27   *
  28   * In e107 code...
  29   * if ($over_func_name = $override->override_check('original_func_name')) {
  30   *    $result=call_user_func($over_func_name, params...);
  31   * }
  32   *
  33   */
  34   
  35  class override {
  36      var $functions = array();
  37      var $includes = array();
  38       
  39  	function override_function($override, $function, $include) {
  40          if ($include) {
  41              $this->includes[$override] = $include;
  42          }
  43          else if (isset($this->includes[$override])) {
  44              unset($this->includes[$override]);
  45          }
  46          $this->functions[$override] = $function;
  47      }
  48       
  49  	function override_check($override) {
  50          if (isset($this->includes[$override])) {
  51              if (file_exists($this->includes[$override])) {
  52                  include_once($this->includes[$override]);
  53              }
  54              if (function_exists($this->functions[$override])) {
  55                  return $this->functions[$override];
  56              } else {
  57                  return false;
  58              }
  59          } else {
  60              return false;
  61          }
  62      }
  63  }
  64      
  65  ?>