1 | <?php |
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2 | // +----------------------------------------------------------------------+ |
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3 | // | PHP Version 4 | |
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4 | // +----------------------------------------------------------------------+ |
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5 | // | Copyright (c) 1997-2004 The PHP Group | |
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6 | // +----------------------------------------------------------------------+ |
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7 | // | This source file is subject to version 3.0 of the PHP license, | |
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8 | // | that is bundled with this package in the file LICENSE, and is | |
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9 | // | available at through the world-wide-web at | |
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10 | // | http://www.php.net/license/3_0.txt. | |
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11 | // | If you did not receive a copy of the PHP license and are unable to | |
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12 | // | obtain it through the world-wide-web, please send a note to | |
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13 | // | license@php.net so we can mail you a copy immediately. | |
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14 | // +----------------------------------------------------------------------+ |
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15 | // | Authors: Aidan Lister <aidan@php.net> | |
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16 | // | Stephan Schmidt <schst@php.net> | |
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17 | // +----------------------------------------------------------------------+ |
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18 | // |
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19 | // $Id: strripos.php,v 1.24 2005/08/10 10:19:59 aidan Exp $ |
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20 | |
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21 | |
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22 | /** |
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23 | * Replace strripos() |
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24 | * |
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25 | * @category PHP |
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26 | * @package PHP_Compat |
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27 | * @link http://php.net/function.strripos |
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28 | * @author Aidan Lister <aidan@php.net> |
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29 | * @version $Revision: 1.24 $ |
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30 | * @since PHP 5 |
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31 | * @require PHP 4.0.0 (user_error) |
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32 | */ |
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33 | if (!function_exists('strripos')) { |
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34 | function strripos($haystack, $needle, $offset = null) |
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35 | { |
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36 | // Sanity check |
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37 | if (!is_scalar($haystack)) { |
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38 | user_error('strripos() expects parameter 1 to be scalar, ' . |
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39 | gettype($haystack) . ' given', E_USER_WARNING); |
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40 | return false; |
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41 | } |
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42 | |
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43 | if (!is_scalar($needle)) { |
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44 | user_error('strripos() expects parameter 2 to be scalar, ' . |
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45 | gettype($needle) . ' given', E_USER_WARNING); |
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46 | return false; |
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47 | } |
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48 | |
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49 | if (!is_int($offset) && !is_bool($offset) && !is_null($offset)) { |
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50 | user_error('strripos() expects parameter 3 to be long, ' . |
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51 | gettype($offset) . ' given', E_USER_WARNING); |
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52 | return false; |
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53 | } |
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54 | |
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55 | // Initialise variables |
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56 | $needle = strtolower($needle); |
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57 | $haystack = strtolower($haystack); |
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58 | $needle_fc = $needle{0}; |
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59 | $needle_len = strlen($needle); |
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60 | $haystack_len = strlen($haystack); |
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61 | $offset = (int) $offset; |
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62 | $leftlimit = ($offset >= 0) ? $offset : 0; |
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63 | $p = ($offset >= 0) ? |
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64 | $haystack_len : |
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65 | $haystack_len + $offset + 1; |
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66 | |
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67 | // Reverse iterate haystack |
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68 | while (--$p >= $leftlimit) { |
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69 | if ($needle_fc === $haystack{$p} && |
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70 | substr($haystack, $p, $needle_len) === $needle) { |
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71 | return $p; |
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72 | } |
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73 | } |
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74 | |
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75 | return false; |
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76 | } |
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77 | } |
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78 | |
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79 | ?> |
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