note 53898 added to function.mcrypt-generic

what does "use rtrim()($str, "\0") to remove the padding." from the above description mean? ---- Manual Page -- http://www.php.net/manual/en/function.mcrypt-generic.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+53898 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+53898&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+53898&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+53898&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+53898&report=yes&reason=useless Delete: non-english -- http://master.php.net/manage/user-notes.php?action=delete+53898&report=yes&reason=non-english Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+53898&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+53898&report=yes Search -- http://master.php.net/manage/user-notes.php