note 59708 added to reference.pcre.pattern.syntax

If you want to match any character other than reverse solidus (backslash), e.g.: to replace double single quotes in a string but not if they are preceeded by a backslash, try: <?php preg_replace ( "/[^\\x5c]''/", "null", $sql ); ?> ---- Manual Page -- http://www.php.net/manual/en/reference.pcre.pattern.syntax.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+59708 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+59708&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+59708&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+59708&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+59708&report=yes&reason=useless Delete: non-english -- http://master.php.net/manage/user-notes.php?action=delete+59708&report=yes&reason=non-english Delete: already in docs -- http://master.php.net/manage/user-notes.php?action=delete+59708&report=yes&reason=already+in+docs Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+59708&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+59708&report=yes Search -- http://master.php.net/manage/user-notes.php