note 53592 added to function.mktime

Here is a quick way to check the a date is valid. I use this when I get users to enter dates via drop downs, which leave open the possibility for impossible dates like 30-Feb-2005 and 31-Jun-2005 etc. This is only necessary as mktime() will accept these invalid dates, which is, in my case, sometimes not the desired handling. <?php function isvaliddate($day, $month, $year) { $day = intval($day); $month = intval($month); $year = intval($year); $time = mktime(0,0,0,$month,$day,$year); if ($day != date("j",$time)) return false; if ($month != date("n",$time)) return false; if ($year != date("Y",$time)) return false; return true; } ?> Note that date("Y",$time) checks the year as a 4 digit year. That line could be replaced as shown below to allow for the 2 digit notation as well. Also the order the arguments need to be specified is day, month, year, because I come from NZ and that is the format we use here. If you prefer another format, for example month, day, year, just change the order of the arguments on the first line. <?php function isvaliddate($day, $month, $year) { $day = intval($day); $month = intval($month); $year = intval($year); $time = mktime(0,0,0,$month,$day,$year); if ($day != date("j",$time)) return false; if ($month != date("n",$time)) return false; if (($year != date("Y",$time)) AND ($year != date("y",$time))) return false; return true; } ?> Hope this helps someone! Cheers, Hayden. ---- Manual Page -- http://www.php.net/manual/en/function.mktime.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+53592 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+53592&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+53592&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+53592&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+53592&report=yes&reason=useless Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+53592&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+53592&report=yes Search -- http://master.php.net/manage/user-notes.php