跨域COOKIE设置 header('P3P: CP="CURa ADMa DEVa PSAo PSDo OUR BUS UNI PUR INT DEM STA PRE COM NAV OTC NOI DSP COR"');可以发送这样子的头。这里有个例子http://hi.baidu.com/thinkinginlamp/blog/item/5e2a02084f1dafd163d9865f.html
