mce_buttons_3

apply_filters('mce_buttons_3') is found 2 times:

• /wp-includes/class-wp-editor.php line 721

  				 * @param array  $mce_buttons_3 Third-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_3 = apply_filters( 'mce_buttons_3', array(), $editor_id );
  
  				/**
  				 * Filters the fourth-row list of TinyMCE buttons (Visual tab).
  				 *
  				 * @since 2.5.0
  				 * @since 3.3.0 The `$editor_id` parameter was added.
  

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• /wp-includes/script-loader.php line 592

   
  	/** This filter is documented in wp-includes/class-wp-editor.php */
  	$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(
  

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