admin_head-upload.php admin_head-upload.php Share this:TweetLike this:Like Loading... Hook Type: actionSee hook in action See this hook used in plugins:Select Pluginregenerate-thumbnails.3.0.2regenerate-thumbnails.3.1.0regenerate-thumbnails.3.1.1regenerate-thumbnails.3.1.2regenerate-thumbnails.3.1.3regenerate-thumbnails.3.1.4regenerate-thumbnails.3.1.5regenerate-thumbnails.3.1.6