Nothing complicated, just paste the code below into your functions.php file, save it, and you’re done.
// Break Out of Frames for WordPress
function break_out_of_frames() {
if (!is_preview()) {
echo "\n<script type=\"text/javascript\">";
echo "\n<!--";
echo "\nif (parent.frames.length > 0) { parent.location.href = location.href; }";
echo "\n-->";
echo "\n</script>\n\n";
}
}
add_action('wp_head', 'break_out_of_frames');
Thanks to WP Mix for this very handy tip!