Wordpress editor template functions - customize the Wordpress WYSIWYG TinyMCE editor

editor-functions.php

<?php 

// Remove default buttons from the first row of editor buttons in the Wordpress WYSIWYG editor
add_filter( 'mce_buttons', 'remove_unnecessary_editor_buttons_mce');
function remove_unnecessary_editor_buttons_mce( $buttons ) {

  	$invalid_buttons = array(
  		// 'bold',
  		// 'italic',
		'strikethrough',
		// 'bullist',
		// 'numlist',
		// 'blockquote',
		'hr',
		// 'alignleft',
		// 'aligncenter',
		// 'alignright',
		// 'link',
		// 'unlink',
		'wp_more',
		'fullscreen',
		'wp_adv'
	);

 	foreach ( $buttons as $button_key => $button_value ) {
		if ( in_array( $button_value, $invalid_buttons ) ) {
			unset( $buttons[ $button_key ] );
		}
 	}
 	return $buttons;
}

// Remove default buttons from the second row of editor buttons (Kitchen sink) in the Wordpress WYSIWYG editor
add_filter( 'mce_buttons_2', 'remove_unnecessary_editor_buttons_mce2');
function remove_unnecessary_editor_buttons_mce2( $buttons ) {

  	$invalid_buttons = array(
		// 'mce-menubtn',
		'underline',
		'justifyfull',
		'forecolor',
		'|',
		'pastetext',
		'pasteword',
		'removeformat',
		'charmap',
		'outdent',
		'indent',
		'undo',
		'redo',
		'wp_help',
		'alignjustify'
	);

 	foreach ( $buttons as $button_key => $button_value ) {
 		if ( in_array( $button_value, $invalid_buttons ) ) {
   			unset( $buttons[ $button_key ] );
 		}
 	}
 	return $buttons;
}


// Force the kitchen sink to always be on
// Caution - this might flood your basement
add_filter( 'tiny_mce_before_init', 'force_kitchensink_open' );
function force_kitchensink_open( $args ) {
	$args['wordpress_adv_hidden'] = false;
	return $args;
}


// Modifying items that appear in the Format dropdown list, on the left hand side of second row of editor buttons
function mce_mod( $init ) {
	$init['block_formats'] = "H1 Title (Largest, bold)=h1; H2 Title (Large)=h2; H3 Title (Medium, bold)=h3; Paragraph (Regular Text)=p; Blockquote Style 1 (Green text)=h4; Blockquote Style 2=blockquote;";
	return $init;
}
add_filter('tiny_mce_before_init', 'mce_mod');