"Configuration file exists."])); if (!isset($_GET) || empty($_GET)) die(json_encode(["error" => "Incorrect parameters"])); foreach($_GET as $key => $str) ${$key} = $str; if ($method == "sql") { $conn = mysqli_connect($host, $user, $password, $database); // check connection if (mysqli_connect_errno()) die(json_encode(["error" => "Failed to connect to MySQL: " . mysqli_connect_error()])); // close connection mysqli_close($conn); die(json_encode(["success" => "SQL Connection successful"])); }