note 60930 added to function.mktime

mickyfunk at hotmail dot com wrote a nice pice of code but if the person has borne before 1969 the code won't work. How to solve that? ---- Server IP: 81.92.200.26 Probable Submitter: 85.241.117.201 ---- Manual Page -- http://www.php.net/manual/en/function.mktime.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+60930 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+60930&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+60930&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+60930&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+60930&report=yes&reason=useless Delete: non-english -- http://master.php.net/manage/user-notes.php?action=delete+60930&report=yes&reason=non-english Delete: already in docs -- http://master.php.net/manage/user-notes.php?action=delete+60930&report=yes&reason=already+in+docs Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+60930&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+60930&report=yes Search -- http://master.php.net/manage/user-notes.php