Methods to prevent pages from being called by frames (js,php)

This is very simple to do, JS words as long as if (window!= top) on the line, and the PHP tutorial as long as the Judge $_server[' Http_host '; The specified domain name can prevent the page from being invoked.
-->
<

Script language= Web Effects >

if (window!= top)
{
Alert (' Test ');
Top.location.href=location.href
}

</script>

Fdsafsafsdafsa

<iframe src= "2.html" ></iframe>

PHP processing

?
$host = $_server[' http_host '];
$DM = ' aaa.com ';
if ($host!= ' aaa.com ')
{
Echo ' Framework call ';
Exit
}
?>