If you want a bit more secure in your iframes use this javascript in <body></body> tags on your php scripts.
sorry if I posted in the wrong forum.
HTML Code:
<script language="javascript"
type="text/javascript"
src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js">
</script>
<script type="text/javascript" language="javascript">
$(function() {
$(this).bind("contextmenu", function(e) {
e.preventDefault();
});
});
</script>
Credits by site :