mce_buttons_4

apply_filters('mce_buttons_4') is found 2 times:

• /wp-includes/class-wp-editor.php line 733

  				 * @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.
  				 */
  				$mce_buttons_4 = apply_filters( 'mce_buttons_4', array(), $editor_id );
  			}
  
  			$body_class = $editor_id;
  
  			$post = get_post();
  			if ( $post ) {
  

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• /wp-includes/script-loader.php line 594

  	$toolbar2 = apply_filters( 'mce_buttons_2', $toolbar2, 'classic-block' );
  	/** This filter is documented in wp-includes/class-wp-editor.php */
  	$toolbar3 = apply_filters( 'mce_buttons_3', array(), 'classic-block' );
  	/** This filter is documented in wp-includes/class-wp-editor.php */
  	$toolbar4 = apply_filters( 'mce_buttons_4', array(), 'classic-block' );
  	/** This filter is documented in wp-includes/class-wp-editor.php */
  	$external_plugins = apply_filters( 'mce_external_plugins', array(), 'classic-block' );
  
  	$tinymce_settings = array(
  		'plugins'              => implode( ',', $tinymce_plugins ),
  		'toolbar1'             => implode( ',', $toolbar1 ),
  

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