利用p3p跨域傳遞COOKIE

A域www.a.com B域www.b.com

<?php

setcookie("name","zy",time()+3600,"/",".a.com");

echo '設定cookie("name")='.$_COOKIE["name"];

?>

<script src="http://www.b.com/setb.php?name=zy"></script>

A域下的調用B域SETCOOKIE頁的PHP檔案，

<?php

header('P3P: CP="CURa ADMa DEVa PSAo PSDo OUR BUS UNI PUR INT DEM STA PRE COM NAV OTC NOI DSP COR"');

setcookie("name",$_GET["name"],time()+3600,"/",".b.com");

echo '設定cookie("name")='.$_COOKIE["name"];

B域下的SETCOOKIE頁，用到P3P頭，

<?php

echo 'b.com cookie("name")='.$_COOKIE["name"];

?>

B域下的GETCOOKIE頁。