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Notice: Undefined index: user_id in E:\xampp\htdocs\public\series.php on line 5
Fatal error: Uncaught Error: Call to undefined function mysql_real_escape_string() in E:\xampp\htdocs\public\class.php:295
Stack trace:
#0 E:\xampp\htdocs\public\series.php(5): Myclass->getSubjectUniversityInstructor(NULL)
#1 {main}
thrown in E:\xampp\htdocs\public\class.php on line 295