Apply Google Fonts on WordPress Themes and Plugins

function elevation_google_fonts_url() {
    $font_url = '';   
    if ( 'off' !== _x( 'on', 'Google font: on or off', 'elevation' ) ) {
        $font_url = add_query_arg( 'family', urlencode( 'Montserrat:400,700,800|Open Sans:400,300,600,700,800|Roboto:300,400,500,700' ), "//fonts.googleapis.com/css" );
    }
    return $font_url;
}

function elevation_scripts() {
  wp_enqueue_style( 'elevation-google-fonts', elevation_google_fonts_url() );
}
add_action( 'wp_enqueue_scripts', 'elevation_scripts' );