Allow iframe tags in wp editor

allow-iframes.php

<?php
/*
Plugin Name: Frameitron
Plugin URI: http://ninnypants.com
Description: Allow iframes in tinymce for all user levels
Version: 1.0
Author: ninnypants
Author URI: http://ninnypants.com
License: GPL2

Copyright 2013  Tyrel Kelsey  (email : tyrel@ninnypants.com)

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License, version 2, as
published by the Free Software Foundation.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/
class Frameitron {
	public function __construct(){
		add_action( 'init', array( $this, 'frame_it_up' ), 20 );
		add_filter( 'tiny_mce_before_init', array( $this, 'frame_it_up_tinymce' ) );
	}

	public function Frameitron(){
		$this->__construct();
	}

	public function frame_it_up( $init_array ){
		global $allowedtags, $allowedposttags;
		$allowedposttags['iframe'] = $allowedtags['iframe'] = array(
			'name' => true,
			'id' => true,
			'class' => true,
			'style' => true,
			'src' => true,
			'width' => true,
			'height' => true,
			'allowtransparency' => true,
			'frameborder' => true,
		);
	}

	public function frame_it_up_tinymce( $init_array ){
		if( isset( $init_array['extended_valid_elements'] ) )
			$init_array['extended_valid_elements'] .= ',iframe[id|name|class|style|src|width|height|allowtransparency|frameborder]';
		else
			$init_array['extended_valid_elements'] = 'iframe[id|name|class|style|src|width|height|allowtransparency|frameborder]';

		return $init_array;
	}
}
$frameitron = new Frameitron;