<?php

// +----------------------------------------------------------------------+

// | PHP Version 4                                                        |

// +----------------------------------------------------------------------+

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

// +----------------------------------------------------------------------+

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

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

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

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

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

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

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

// +----------------------------------------------------------------------+

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

// |          Stephan Schmidt <schst@php.net>                             |

// +----------------------------------------------------------------------+

//

// $Id: strripos.php,v 1.24 2005/08/10 10:19:59 aidan Exp $





/**

 * Replace strripos()

 *

 * @category    PHP

 * @package     PHP_Compat

 * @link        http://php.net/function.strripos

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

 * @version     $Revision: 1.24 $

 * @since       PHP 5

 * @require     PHP 4.0.0 (user_error)

 */

if (!function_exists('strripos')) {

    function strripos($haystack, $needle, $offset = null)

    {

        // Sanity check

        if (!is_scalar($haystack)) {

            user_error('strripos() expects parameter 1 to be scalar, ' .

                gettype($haystack) . ' given', E_USER_WARNING);

            return false;

        }



        if (!is_scalar($needle)) {

            user_error('strripos() expects parameter 2 to be scalar, ' .

                gettype($needle) . ' given', E_USER_WARNING);

            return false;

        }



        if (!is_int($offset) && !is_bool($offset) && !is_null($offset)) {

            user_error('strripos() expects parameter 3 to be long, ' .

                gettype($offset) . ' given', E_USER_WARNING);

            return false;

        }



        // Initialise variables

        $needle         = strtolower($needle);

        $haystack       = strtolower($haystack);

        $needle_fc      = $needle{0};

        $needle_len     = strlen($needle);

        $haystack_len   = strlen($haystack);

        $offset         = (int) $offset;

        $leftlimit      = ($offset >= 0) ? $offset : 0;

        $p              = ($offset >= 0) ?

                                $haystack_len :

                                $haystack_len + $offset + 1;



        // Reverse iterate haystack

        while (--$p >= $leftlimit) {

            if ($needle_fc === $haystack{$p} &&

                substr($haystack, $p, $needle_len) === $needle) {

                return $p;

            }

        }



        return false;

    }

}



?>