.josh Posted December 1, 2008 Share Posted December 1, 2008 <?php /******************************************************************************* **Description: returns string with all the words filtered, preserving the non-masked characters' case in the matched word. **Syntax: string filter(string $str[, bool $is_whole_word]); **Parameters: str - The string to be filtered is_whole_word - If set to TRUE, only whole words will be filtered. If set to FALSE, it will match words within words. Defaults to TRUE if not specified. **Examples: echo filter("FucK you moTherfUckeR"); // output: F*cK you moTherfUckeR echo filter("FucK you moTherfUckeR", false); // output: F*cK you moTherf*ckeR **Internal Syntax & Parameters: $wordlist = array($key1 => $value1[, $key2 => $value2, [etc..]]]); key - The word to search for. value - The filter for the key. Even if is_whole_word is set to FALSE, only the the key substring of the word will be masked. In principle, anything that evaluates (strtolower($value{$pos}) == strtolower($badword{$pos})) to FALSE will be considered a mask. Examples: key: sex value | badword | replacement s3x | sex | s3x s3x | SEX | S3X * | sex | * **** | sex | **** s3x | sexual | s3xual s3x | SeXual | S3Xual * | sexual | *ual s3x | asexual | as3xual * | asexual | a*ual *******************************************************************************/ /*** function filter **********************************************************/ function filter($string, $wholeword = true) { // list of words and filters $wordlist = array('shit' => 'sh!t', 'suck' => 'svck', 'dang' => 'darn', 'fuck' => 'f*ck', 'sex' => 's3x', 'bitch' => 'b!tch', 'cunt' => 'cvnt', 'cock' => 'c0ck', 'ass' => 'arse', 'nigger' => 'negro', 'whore' => 'wh0re', 'dick' => 'd!ck'); // for each word in the list of words to replace... foreach ($wordlist as $word => $filter) { // find all instances of current bad word $word = ($wholeword == true)? "/\b{$word}\b/i" : "/{$word}/i"; preg_match_all($word, $string, $matches); // for each bad word found.... foreach ($matches[0] as $bword) { // init the string (so it resets each loop iteration) $replacement = ''; // find out how many letters are in the filter $count = strlen($filter); // for each letter in the filter... for ($pos = 0; $pos < $count; $pos++) { // compare the current letter to the letter in the bad word // if it's the same (case insensitive), use the bad word letter // if it's not the same use the filter letter. // In this manner, the replacement word is built $replacement .= (strcasecmp($filter{$pos},$bword{$pos}) == 0)? $bword{$pos} : $filter{$pos}; } // end for pos // pattern slightly varies, depending on wholeword $pattern = ($wholeword == true)? "/\b{$bword}\b/" : "/{$bword}/"; // switch out the bad word with the replacement $string = preg_replace($pattern, $replacement, $string); } // end foreach match } // end foreach wordlist // return result return $string; } // *** End function filter ************************************************** // example use: $string = 'sex sexual asexual'; echo "original: $string <br/>"; echo "whole word: " . filter($string) . "<br>"; echo "all matched: " . filter($string, false); /******** output: ************** original: sex sexual asexual whole word: s3x sexual asexual all matched: s3x s3xual as3xual ********************************/ ?> Link to comment Share on other sites More sharing options...
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