note 99205 added to function.md5

Does someone know whether long text encryptions with md5 always gives unique results? Just asking because we use md5 to generate a unique cache ID for a db cache script. Instead of creating a proper cache ID for each query we just use the query.... I'm not sure whether md5 works fine that way if there are really long query strings (over 300 characters sometimes) and quite similar with maybe only one character different. Example: "SELECT .... FROM ... JOIN ... WHERE ... AND id = 321" and the same one with just "SELECT .... FROM ... JOIN ... WHERE ... AND id = 322" I tested a few times with success but: Will md5() return unique values always? ---- Server IP: 69.147.83.197 Probable Submitter: 85.56.16.42 ---- Manual Page -- http://www.php.net/manual/en/function.md5.php Edit -- https://master.php.net/note/edit/99205 Del: integrated -- https://master.php.net/note/delete/99205/integrated Del: useless -- https://master.php.net/note/delete/99205/useless Del: bad code -- https://master.php.net/note/delete/99205/bad+code Del: spam -- https://master.php.net/note/delete/99205/spam Del: non-english -- https://master.php.net/note/delete/99205/non-english Del: in docs -- https://master.php.net/note/delete/99205/in+docs Del: other reasons-- https://master.php.net/note/delete/99205 Reject -- https://master.php.net/note/reject/99205 Search -- https://master.php.net/manage/user-notes.php