/* Create Shortcode for ACF Gallery || Example with Wordpress Gallery */
function acf_gallery_shortcode() {
	$images   = get_field( 'gallery' );
	$image_ids = array();
	if ( $images ) {
		foreach ( $images as $image ) {
			array_push( $image_ids, $image['ID'] );
		}
		// Generate string of ids ("123,456,789").
		$images_string = implode( ',', $image_ids );

		// Generate and do shortcode.
		// Note: The following string is split to simply prevent our own website from rendering the gallery shortcode.
		$shortcode = sprintf( '[' . 'gallery ids="%s"]', esc_attr( $images_string ) );
		echo do_shortcode( $shortcode );
	}
}
add_shortcode( 'gallery_acf', 'acf_gallery_shortcode' ); /* Shortcode Name, Functions Name || Use [gallery_acf] */