$host = 'localhost';
    $username = 'b**s';
    $password = '1******m';
    $dbname = 'b*********e';
    $connection = new mysqli($host, $username, $password, $dbname);
    if ($connection->connect_error) {
        die("Connection failed: " . $conn->connect_error);
    }

function insertData(){
        {......}
        if($connection->query($sql)){
            $response['success'] = 'User record successfully added!';
        }
    }