文件結構目錄:php
www.a.com a.setcookie.php a.getcookie.php
cookie
www.b.com b.phpcode
b.php代碼:ip
<script src='http://www.a.com/a.setcookie.php'></script>
a.setcookie.php代碼:get
header("P3P: CP=CURa ADMa DEVa PSAo PSDo OUR BUS UNI PUR INT DEM STA PRE COM NAV OTC NOI DSP COR"); setcookie('username','lisi',time()+3600);
a.getcookie.php代碼:域名
var_dump($_COOKIE['username']);
訪問b域名下的文件 設置了a域名的cookieclass
其實本質是經過script 調用www.a.com下的文件 從而在該域名下設置cookieim