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Warning: Undefined variable $pdo in C:\xampp\htdocs\API\t_verification.php on line 11

Fatal error: Uncaught Error: Call to a member function prepare() on null in C:\xampp\htdocs\API\t_verification.php:11 Stack trace: #0 {main} thrown in C:\xampp\htdocs\API\t_verification.php on line 11