Warning: Undefined variable $MSISDN in C:\xampp\htdocs\application.php on line 57

Warning: Undefined variable $uid in C:\xampp\htdocs\application.php on line 59

Warning: Undefined variable $con in C:\xampp\htdocs\application.php on line 89

Fatal error: Uncaught TypeError: mysqli_close(): Argument #1 ($mysql) must be of type mysqli, null given in C:\xampp\htdocs\application.php:89 Stack trace: #0 C:\xampp\htdocs\application.php(89): mysqli_close(NULL) #1 {main} thrown in C:\xampp\htdocs\application.php on line 89