note 55339 added to function.strtolower

Any of these str... type functions (toupper, tolower) are very slow compared to strtr(). So if your just wanting to convert a string to lower or upper case to use in maybe a custom PHP 4 stripos() function or other type of function where converting the complete string to upper or lower is important use strtr() instead... test.... <? $upper = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'; $lower = 'abcdefghijklmnopqrstuvwxyz'; $str = 'You can contribute your notes to the PHP manual from the comfort of your browser! Just add your comment in the big field below, and, optionally, your email address or name in the little one. After submission, your note will appear under the documentation as a part of the manual.'; $start = microtime(true); $n = 0; while ( $n < 10000 ) { strtolower ( $str ); $n++; } $end = microtime(true); $core = ( $end - $start ); $start = microtime(true); $n = 0; while ( $n < 10000 ) { strtr ( $str, $upper, $lower ); $n++; } $end = microtime(true); $custom = ( $end - $start ); echo 'core function strtolower() X 10000 took ' . $core . '<br />'; echo 'core function strtr() X 10000 took ' . $custom . '<br />'; $diff = ceil ( $core / $custom ); echo 'strtr() function is ( ' . $diff . 'X ) faster than the strtolower() function!'; ?> John ---- Submitter IP: 12.160.245.96 ---- Manual Page -- http://www.php.net/manual/en/function.strtolower.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+55339 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+55339&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+55339&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+55339&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+55339&report=yes&reason=useless Delete: non-english -- http://master.php.net/manage/user-notes.php?action=delete+55339&report=yes&reason=non-english Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+55339&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+55339&report=yes Search -- http://master.php.net/manage/user-notes.php