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Warning: Undefined variable $s in C:\Apache\localhost\www\Editor Tests\Var 1\mudules\subject_mark_all.php on line 3

Warning: Trying to access array offset on null in C:\Apache\localhost\www\Editor Tests\Var 1\mudules\subject_mark_all.php on line 3

Fatal error: Uncaught Error: Call to undefined function mysql_query() in C:\Apache\localhost\www\Editor Tests\Var 1\mudules\subject_mark_all.php:6 Stack trace: #0 {main} thrown in C:\Apache\localhost\www\Editor Tests\Var 1\mudules\subject_mark_all.php on line 6