note 59020 added to function.checkdate

Hi Life.org Thank you for your php script for the date validation. However, can you please tell me how I can validate the date field so it is not mandatory for users to fill. I have used your script in my form but it forces users to fill it. How can I make blank field to be accepted? Thank you ---- Manual Page -- http://www.php.net/manual/en/function.checkdate.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+59020 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+59020&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+59020&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+59020&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+59020&report=yes&reason=useless Delete: non-english -- http://master.php.net/manage/user-notes.php?action=delete+59020&report=yes&reason=non-english Delete: already in docs -- http://master.php.net/manage/user-notes.php?action=delete+59020&report=yes&reason=already+in+docs Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+59020&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+59020&report=yes Search -- http://master.php.net/manage/user-notes.php