pre-plupload-upload-ui action-hook . WP 3.3.0

Fires before the upload interface loads.

Usage

add_action( 'pre-plupload-upload-ui', 'action_function_name_9239' );
function action_function_name_9239(){
	// action...
}

Changelog

Where the hook is called

do_action( 'pre-plupload-upload-ui' ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores

do_action( 'pre-plupload-upload-ui' ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores

Where the hook is used (in WP core)