mce_buttons_4 │ filter-hook │ ACF 1.0

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

Usage

add_filter( 'mce_buttons_4', 'wp_kama_mce_buttons_4_filter', 10, 2 );

/**
 * Function for `mce_buttons_4` filter-hook.
 * 
 * @param array  $mce_buttons_4 Fourth-row list of buttons.
 * @param string $editor_id     Unique editor identifier, e.g. 'content'. Accepts 'classic-block' when called from block editor's Classic block.
 *
 * @return array
 */
function wp_kama_mce_buttons_4_filter( $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.

Where the hook is called

4 => apply_filters( 'mce_buttons_4', array(), $editor_id ),

Where the hook is used in Advanced Custom Fields PRO