Wordpress tiny_mce toolbar customizations

Wordpress custom tiny_mce

<?php

/**
 * Customise the editor buttons.
 *
 * This function takes care of the first row.
 *
 * @param Array $buttons Buttons that are going to be displayed if unchanged.
 */
function tiny_mce_buttons($buttons) {
        // Full reference list here:
	// http://www.tinymce.com/wiki.php/TinyMCE3x:Buttons/controls
	// Or just dump the $buttons variable.
	return array(
		"bold",
		"italic",
		"underline",
		"strikethrough",
		"bullist",
		"numlist",
		"blockquote",
		"link",
		"unlink",
		"pagebreak",
		"redo",
		"undo",
		"styleselect",
		"fullscreen",
		"wp_help"
	);
}
add_filter("mce_buttons", "tiny_mce_buttons", 0);

/**
 * Customise the editor buttons.
 *
 * This function takes care of the second row.
 *
 * @param Array $buttons Buttons that are going to be displayed if unchanged.
 */
function tiny_mce_buttons_2($buttons) {
	// No second row!
	return array();
}
add_filter("mce_buttons_2", "tiny_mce_buttons_2", 0);

/**
 * Add custom classes to be available in the editor styles dropdown.
 *
 * @param Array $init_array tiny_mce configuration values.
 */
function tiny_mce_before_init( $init_array ) {

	// Define the style_formats array
	$style_formats = array(
		// Each array child is a format with it's own settings
		array(
			'title' => 'paragraph',
			'block' => 'p',
			'wrapper' => true
		),
		array(
			'title' => 'preformatted',
			'block' => 'pre',
		),
		array(
			'title' => 'button',
			'selector' => 'a',
			'classes' => 'button button--cta'
		),
		array(
			'title' => 'heading highlighted',
			'selector' => 'h1, h2, h3, h4, h5, h6',
			'classes' => 'highlighted'
		),
		array(
			'title' => 'Heading 1',
			'block' => 'h1',
		),
		array(
			'title' => 'Heading 2',
			'block' => 'h2',
		),
		array(
			'title' => 'Heading 3',
			'block' => 'h3',
		),
		array(
			'title' => 'Heading 4',
			'block' => 'h4',
		),
		array(
			'title' => 'Heading 5',
			'block' => 'h5',
		),
		array(
			'title' => 'Heading 6',
			'block' => 'h6'
		)
	);
	// Insert the array, JSON ENCODED, into 'style_formats'
	$init_array['style_formats'] = json_encode( $style_formats );

	return $init_array;
}
add_filter( 'tiny_mce_before_init', 'tiny_mce_before_init' );

?>