WordPress at a glance
filter is not described

screen_layout_columns filter-hook . WP 2.8.0

Filters the array of screen layout columns.

This hook provides back-compat for plugins using the back-compat Filters instead of add_screen_option().

Usage

add_filter( 'screen_layout_columns', 'filter_function_name_579', 10, 3 );
function filter_function_name_579( $empty_columns, $screen_id, $this ){
	// filter...

	return $empty_columns;
}
$empty_columns(array)
Empty array.
$screen_id(string)
Screen ID.
$this(WP_Screen)
Current WP_Screen instance.

Where the hook is called

WP_Screen::render_screen_meta()
wp-admin/includes/class-wp-screen.php 871
$columns = apply_filters( 'screen_layout_columns', array(), $this->id, $this );

Where the hook is used (in WP core)

Does not used.