note 81724 added to function.md5

This is probably well known, but I had a hard time finding a reference to it. While md5 on a null string returns null, md5 on an EMPTY string does not return null or an empty string. Rather it returns "d41d8cd98f00b204e9800998ecf8427e" ---- Server IP: 209.41.74.194 Probable Submitter: 198.208.159.18 ---- Manual Page -- http://www.php.net/manual/en/function.md5.php Edit -- https://master.php.net/note/edit/81724 Del: integrated -- https://master.php.net/note/delete/81724/integrated Del: useless -- https://master.php.net/note/delete/81724/useless Del: bad code -- https://master.php.net/note/delete/81724/bad+code Del: spam -- https://master.php.net/note/delete/81724/spam Del: non-english -- https://master.php.net/note/delete/81724/non-english Del: in docs -- https://master.php.net/note/delete/81724/in+docs Del: other reasons-- https://master.php.net/note/delete/81724 Reject -- https://master.php.net/note/reject/81724 Search -- https://master.php.net/manage/user-notes.php