function imnobby_regenerate_thumbnail_by_attachment_id($image_id=""){ if ( empty($image_id) ){ exit; } $image_meta = wp_get_attachment_metadata($image_id); $filename = wp_upload_dir()["basedir"] . "/".$image_meta["file"]; $generate_image = wp_generate_attachment_metadata( $image_id, $filename ); }Related Keywords: Developer, How-to, Solved, Regenerate Thumbnail Programmatically, functions.php, Hook, API
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