mce_buttons_4 filter-hook . WP 2.5.0

Filters the fourth-row list of TinyMCE buttons (Visual tab).

Usage

add_filter( 'mce_buttons_4', 'filter_function_name_4093', 10, 2 );
function filter_function_name_4093( $mce_buttons_4, $editor_id ){
	// filter...

	return $mce_buttons_4;
}

$mce_buttons_4(array)

Fourth-row list of buttons.

$editor_id(string)

Unique editor identifier, e.g. 'content'. Accepts 'classic-block' when called from block editor's Classic block.

Changelog

Where the hook is called

$mce_buttons_4 = apply_filters( 'mce_buttons_4', array(), $editor_id );

$toolbar4 = apply_filters( 'mce_buttons_4', array(), 'classic-block' );

Where in WP core the hook is used WordPress