note 89605 added to function.mysql-num-rows

at writing (as well as in an example higher): $num_rows = mysql_num_rows($result); I get an error: Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource in Z:\home\uchoba\www\scripts\registration.php on line 21 where I made a mistake? ---- Server IP: 91.196.196.205 Probable Submitter: 213.130.17.108 ---- Manual Page -- http://www.php.net/manual/en/function.mysql-num-rows.php Edit -- https://master.php.net/note/edit/89605 Del: integrated -- https://master.php.net/note/delete/89605/integrated Del: useless -- https://master.php.net/note/delete/89605/useless Del: bad code -- https://master.php.net/note/delete/89605/bad+code Del: spam -- https://master.php.net/note/delete/89605/spam Del: non-english -- https://master.php.net/note/delete/89605/non-english Del: in docs -- https://master.php.net/note/delete/89605/in+docs Del: other reasons-- https://master.php.net/note/delete/89605 Reject -- https://master.php.net/note/reject/89605 Search -- https://master.php.net/manage/user-notes.php