Filter: postie_gallery

This filter is called when Postie inserts a gallery shortcode into the post (which only ever happens if the “Automatically insert image gallery” setting is turned on). You can use this filter to generate an alternate gallery shortcode.¬†At the point it is called there is only a placeholder post, e.g. the content and metadata is not set yet, however, all the media have been attached.

The $shortcode parameter is the existing shortcode (typically [gallery]).

The $postid parameter is the ID of the post.

add_filter('postie_gallery', 'my_gallery_filter', 10, 2);

function my_gallery_filter($shortcode, $postid) {
 $shortcode = "[mygallery format='flex']";
 return $shortcode;

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