note 37647 added to function.ctype-alpha

Be careful with all of the ctype_* functions as they return true on the empty string, so the following code will execute forever. <?php $string = "abc"; // infinite loop! for($i = 4;ctype_alpha($string[$i]); $i++) { print $i; } ?> so always check the length of the string before doing something like that. i.e.: while($i < strlen($string) && ctype_alpha($string[$i])) ---- Manual Page -- http://www.php.net/manual/en/function.ctype-alpha.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+37647 Delete -- http://master.php.net/manage/user-notes.php?action=delete+37647&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+37647&report=yes Search -- http://master.php.net/manage/user-notes.php