zartgesotten
9/7/2017 - 1:12 PM

Toolset Gallery from multiple image field

Automatically generates a Wordpress Gallery from all Images associated with the current post https://wp-types.com/forums/topic/create-wp-gallery-from-multiple-image-field/

toolset-gallery-from-image-fields.php
content_copyfile_download

/**
 * Register shortcode gallery_from_image_fields
 * required attributes
 *   postid : the post id
 *   slug : the image field slug (no prefix)
 */
add_shortcode( 'gallery_from_image_fields', function( $atts ){
 
    global $wpdb;
 
    $postid = $atts['postid'];
    $slug = 'wpcf-' . $atts['slug'];
 
 
    // Retrieve image field urls
    $images = (array) get_post_meta( $postid, $slug, false);
 
    $ids = array();
    // Convert the urls to post ids for the images
    foreach ($images as $image) {
 
        $attachment = $wpdb->get_col( $wpdb->prepare("SELECT ID FROM $wpdb->posts WHERE guid='%s';", $image ) ); 
        $ids[] = $attachment[0];
    }
 
    $ids_list = join( ',', $ids );
 
    $gallery = '[gallery ids="' . $ids_list . '"]';
 
    $out = do_shortcode( $gallery );
 
    return $out;
});