+ if( $db->query("SELECT COUNT(*) FROM workdone WHERE mnumber=" . $student['mnumber'])->fetch(PDO::FETCH_NUM)[0] > 0 ) {
+ $exdone = $db->query("SELECT manydone FROM workdone WHERE mnumber=" . $student['mnumber'])->fetch(PDO::FETCH_NUM);
+ foreach($exdone as $subdone) { $totexdone += $subdone; }
+ }