mce_buttons filter-hook . WP 2.0.0

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

Usage

add_filter( 'mce_buttons', 'filter_function_name_4375', 10, 2 );
function filter_function_name_4375( $mce_buttons, $editor_id ){
	// filter...

	return $mce_buttons;
}

$mce_buttons(array)

First-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 = apply_filters( 'mce_buttons', $mce_buttons, $editor_id );

$toolbar1 = apply_filters( 'mce_buttons', $toolbar1, 'classic-block' );

Where in WP core the hook is used