note 60493 added to ref.pcre

here is an annotation to my note from 28-Apr-2005 03:52, due to the welcome contribution of dipesh khakhkhar: Here is a small function to determine whether a string is a preg expression. Please note, that a dot '.' character in a regexp may match any character, including a dot, thus a string containing a dot may well be interpreted as an ordinary string, or a regexp. function preg_ispreg($str) { $prefix = ""; $sufix = ""; if ($str[0] != '^') $prefix = '^'; if ($str[strlen($str) - 1] != '$') $sufix = '$'; $estr = preg_replace("'^/'", "\\/", preg_replace("'([^/])/'", "\\1\\/", $str)); if (@preg_match("/".$prefix.$estr.$sufix."/", $str, $matches)) return strcmp($str, $matches[0]) != 0; return true; } ---- Manual Page -- http://www.php.net/manual/en/ref.pcre.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+60493 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+60493&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+60493&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+60493&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+60493&report=yes&reason=useless Delete: non-english -- http://master.php.net/manage/user-notes.php?action=delete+60493&report=yes&reason=non-english Delete: already in docs -- http://master.php.net/manage/user-notes.php?action=delete+60493&report=yes&reason=already+in+docs Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+60493&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+60493&report=yes Search -- http://master.php.net/manage/user-notes.php