WordPress: ebnale iframe for not administrator

functions.php

<?php
function content_save_pre_func($content){
	global $allowedposttags;
	
	$allowedposttags['iframe'] = array(
		'class' => array () ,
		'src'= > array() ,
		'width' => array(),
		'height' => array() ,
		'frameborder' => array() ,
		'scrolling' => array()
	);
	
	return $content;
}
add_filter('content_save_pre','content_save_pre_func');