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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: Arpad Ray <arpad@php.net>                                   |

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

  17  //

  18  // $Id: inet_pton.php,v 1.2 2005/12/05 14:49:40 aidan Exp $

  19  
  20  
  21  /**

  22   * Replace inet_pton()

  23   *

  24   * @category    PHP

  25   * @package     PHP_Compat

  26   * @link        http://php.net/inet_pton

  27   * @author      Arpad Ray <arpad@php.net>

  28   * @version     $Revision: 1.2 $

  29   * @since       PHP 5.1.0

  30   * @require     PHP 4.2.0 (array_fill)

  31   */
  32  if (!function_exists('inet_pton')) {  
  33      function inet_pton($address)
  34      {
  35          $r = ip2long($address);
  36          if ($r !== false && $r != -1) {
  37              return pack('N', $r);
  38          }
  39  
  40          $delim_count = substr_count($address, ':');
  41          if ($delim_count < 1 || $delim_count > 7) {
  42              return false;
  43          }
  44  
  45          $r = explode(':', $address);
  46          $rcount = count($r);
  47          if (($doub = array_search('', $r, 1)) !== false) {
  48              $length = (!$doub || $doub == $rcount - 1 ? 2 : 1);
  49              array_splice($r, $doub, $length, array_fill(0, 8 + $length - $rcount, 0));
  50          }
  51  
  52          $r = array_map('hexdec', $r);
  53          array_unshift($r, 'n*');
  54          $r = call_user_func_array('pack', $r);
  55  
  56          return $r;
  57      }
  58  }
  59  
  60  ?>