note 78294 added to function.mktime

This is the problem: Warning: mktime() expects parameter 4 to be long, string given in C:\xampp\xampp\htdocs\protocolo\uftodos2.php on line 36 And this is the code: function date_diff($from, $to) { list($from_month, $from_day, $from_year) = explode("-", $from); list($to_month, $to_day, $to_year) = explode("-", $to); $from_date = mktime(0,0,0,$from_month,$from_day,$from_year); $to_date = mktime(0,0,0,$to_month,$to_day,$to_year); $days = ($to_date - $from_date)/86400; return ceil($days); } I need help... ---- Server IP: 200.185.109.13 Probable Submitter: 200.179.42.106 ---- Manual Page -- http://www.php.net/manual/en/function.mktime.php Edit -- https://master.php.net/note/edit/78294 Del: integrated -- https://master.php.net/note/delete/78294/integrated Del: useless -- https://master.php.net/note/delete/78294/useless Del: bad code -- https://master.php.net/note/delete/78294/bad+code Del: spam -- https://master.php.net/note/delete/78294/spam Del: non-english -- https://master.php.net/note/delete/78294/non-english Del: in docs -- https://master.php.net/note/delete/78294/in+docs Del: other reasons-- https://master.php.net/note/delete/78294 Reject -- https://master.php.net/note/reject/78294 Search -- https://master.php.net/manage/user-notes.php