Fatal error: Uncaught Error: Call to undefined function mysql_connect() in D:\xampp\htdocs\tracking\summerschool\!\includes\db.php:9 Stack trace: #0 D:\xampp\htdocs\tracking\summerschool\!\includes\db.php(34): db->connect() #1 D:\xampp\htdocs\tracking\summerschool\!\includes\sessions.php(15): db->query('SELECT 1 FROM i...') #2 D:\xampp\htdocs\tracking\summerschool\!\includes\site.php(8): session->__construct() #3 D:\xampp\htdocs\tracking\summerschool\login.php(2): include('D:\\xampp\\htdocs...') #4 {main} thrown in D:\xampp\htdocs\tracking\summerschool\!\includes\db.php on line 9