我知道这个问题已经被问了十二遍或更多遍了，给出的每一个回答都表明我做对了，但也许我遗漏了一些东西。

AJAX可以像这样满足CORS请求…

$.ajax({
url: 'someotherdomain.com',
type: 'post',
data: {key: 'value'},
dataType: 'json',
async: false,
crossDomain: true,
beforeSend: function(xhr){
    xhr.withCredentials = true;
},
success: function(x, status, xhr){

},
error: function(xhr, status, error){

}
});

PHP可以像这样满足CORS请求…

header('Access-Control-Max-Age: 1728000');
header('Access-Control-Allow-Origin: http://someotherdomain.com');
header('Access-Control-Allow-Methods: POST');
header('Access-Control-Allow-Headers: Content-MD5, X-Alt-Referer');
header('Access-Control-Allow-Credentials: true');
header("Content-Type: application/json; charset=utf-8");

根据所有文档，只要设置了“ Access-Control-Allow-Credentials”服务器端标头和“ withCredentials =
true”客户端标头，域之间的会话cookie处理就应该透明。我想念什么吗？