note 101814 added to function.preg-replace

Accent independent highlighting of text, UTF-8 safe: <?php function prepare_search_term($str,$delim='#') { $search = preg_quote($str,$delim); $search = preg_replace('/[aàáâãåäæ]/iu', '[aàáâãåäæ]', $search); $search = preg_replace('/[eèéêë]/iu', '[eèéêë]', $search); $search = preg_replace('/[iìíîï]/iu', '[iìíîï]', $search); $search = preg_replace('/[oòóôõöø]/iu', '[oòóôõöø]', $search); $search = preg_replace('/[uùúûü]/iu', '[uùúûü]', $search); // add more characters... return $search; } function highlight($searchtext, $text) { $search = prepare_search_term($searchtext); return preg_replace('#' . $search . '#iu', '<span style="background-color:red">$0</span>', $text); } $testtext = 'cafe cáfé càfè CAFE CÁFÉ CÀFÈ càfé cáfè CÀFÉ CÁFÈ'; echo highlight('cafe',$testtext) . '<br />'; echo highlight('cáfé',$testtext) . '<br />'; echo highlight('CAFE',$testtext) . '<br />'; echo highlight('CÀFÉ',$testtext) . '<br />'; ?> This function finds and highlights all words in $testtext with (e.g.) every single word in $testtext as input. Useful if you retrieved a text from a MySQL database and want to highlight the search term accent-independently. The main trick is in "prepare_search_term": Every single character of the search pattern (1st parameter of preg_replace) in the search term is replaced by the whole string in the 2nd parameter, which then in function "highlight" acts as the search pattern for replacement there. Hope you find this useful. ---- Server IP: 217.160.235.204 Probable Submitter: 77.20.144.189 ---- Manual Page -- http://www.php.net/manual/en/function.preg-replace.php Edit -- https://master.php.net/note/edit/101814 Del: integrated -- https://master.php.net/note/delete/101814/integrated Del: useless -- https://master.php.net/note/delete/101814/useless Del: bad code -- https://master.php.net/note/delete/101814/bad+code Del: spam -- https://master.php.net/note/delete/101814/spam Del: non-english -- https://master.php.net/note/delete/101814/non-english Del: in docs -- https://master.php.net/note/delete/101814/in+docs Del: other reasons-- https://master.php.net/note/delete/101814 Reject -- https://master.php.net/note/reject/101814 Search -- https://master.php.net/manage/user-notes.php