remove domain from url dynamically

function remove_domain_from_url( $url = NULL ) {
    if ( $url ) {
        $array     =   parse_url( $url );
        $output    =   $array["path"];
    } else {
        $output    =   NULL;
    }
    return $output;
}
remove_domain_from_url( 'https://digwp.com/2016/08/wordpress-functions-php-template-part/' );