Verhindert die Anzeige des Inhalts in Frames (sog. Framebreaker).
Plugin
// Framebreaker
function framebreaker() {
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>nn";
}
}
add_action('wp_head', 'framebreaker');