dna-framebreaker.php

<?php
/**
 * Plugin Name: dna Framebreaker
 * Plugin URI:  https://gist.github.com/4045656
 * Description: Add a framebreaker javascript to the header. (Requires PHP 5.3)
 * Version:     0.1
 * Author:      David Naber
 * Author URI:  http://dnaber.de
 * License:     MIT
 * License URI: http://opensource.org/licenses/MIT
 */

// From an idea of tosho: http://toscho.de/2010/wordpress-tutorial-ein-framebreaker-plugin-schreiben/

namespace dna\Framebreaker;

add_action( 'wp_head', __NAMESPACE__ . '\framebreaker' );

/**
 * set the js to the head
 *
 * @wp-hook wp_head
 * @return void
 */
function framebreaker() {
	$script = <<<EOT
	<script type="text/javascript">
		if ( self != top )
			top.location.replace( self.location.href );
	</script>
EOT;

	echo apply_filters( 'dna_framebreaker_script', $script );
}