Fatal error: Uncaught TypeError: mysqli_real_escape_string(): Argument #1 ($mysql) must be of type mysqli, null given in /home/lenteral/public/cbt-test.sivia.id/login/inc/fungsi.php:13 Stack trace: #0 /home/lenteral/public/cbt-test.sivia.id/login/inc/fungsi.php(13): mysqli_real_escape_string(NULL, '') #1 /home/lenteral/public/cbt-test.sivia.id/login/index.php(4): filter('') #2 {main} thrown in /home/lenteral/public/cbt-test.sivia.id/login/inc/fungsi.php on line 13