$value) { echo $key . ' - ' . $value."
"; } try { //Try to connect to the database $connect = mysqli_connect($host, $username, $password, $db_name); //Connecting to database }catch (mysqli_sql_exception){ //If the connection failed print(json_encode("Failed to connect to MySQL, connection timeout")); //Return a json string, so the dart script can interpret the error exit(-1); //Send a return code as -1, so insert.php can know if the connection is successful }