[Plugin: Thumbnails for Backend] Function not defined
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Don’t know what I’m doing wrong … are there some prerequisites I have to fullfill? When going to the Articles or pages in the Backend, I only see this in the Box:
Fatal error: Call to undefined function get_post_thumbnail_id() in … /wp-content/plugins/thumbnailsforbackend/thumbnailsforbackend.php on line 109
Which is:
$id_thumb = get_post_thumbnail_id($post->ID);Where should this function be defined? Is it missing in my template?
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Viewing 4 replies - 1 through 4 (of 4 total)
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