php setcookie 不适用于 ajax 调用 [英] php setcookie not working with ajax call
问题描述
我有一个页面 test.php，代码如下:
I have a page, test.php, with the following code:
<html>
<body>
<form>
<script type="text/javascript">
function SendCookies(){
if (window.XMLHttpRequest)/* code for IE7+, Firefox, Chrome, Opera, Safari */
{ xmlhttp=new XMLHttpRequest(); }
else /* code for IE6, IE5 */
{ xmlhttp=new ActiveXObject("Microsoft.XMLHTTP"); }
xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState==4 && xmlhttp.status == 200)
{
alert('done');
}
}
xmlhttp.open("GET", "/web/DEV/Classes/SetCookie.php?time=" + new Date());
xmlhttp.send();
}
</script>
<input type="text" id="txtInput" name="txtInput"/>
<input type="button" id="btnSubmit" name="btnSubmit" value="Submit" onclick="SendCookies()"/>
<div id="divTest">
<?php
if (isset($_COOKIE["TestCookie"])) {
echo $_COOKIE["TestCookie"];
} else {
echo "__Results__";
}
?>
</div>
</form>
</body>
</html>
我有一个页面，SetCookie.php，代码如下:
I have a page, SetCookie.php, with the following code:
<?php
$var = "THIS IS A TEST";
setcookie("TestCookie", $var, time()+60*60*24*30);
?>
当点击 test.php 的按钮时，我使用 XMLHttpRequest 来调用我的 SetCookie.php 页面.页面执行，因为如果我向它添加回声，我会在 xmlhttp 响应中得到它.但是，似乎没有设置 TestCookie.
When test.php's button is clicked, i use XMLHttpRequest to call my SetCookie.php page. The page executes, becuase if i add an echo to it, i get that in the xmlhttp response. However, TestCookie does not seem to be getting set.
如果在 text.php 中，我执行在 SetCookie.php 中找到的相同命令，然后为所有浏览器会话设置相应的 cookie.
If in text.php, i do the same command found in SetCookie.php, the cookie is then set accordingly for all browser sessions.
即使在我关闭/打开浏览器之后，cookie 与我曾经在我的 test.php 页面中手动设置时一样保持不变.
Even after i close / open the browser, the cookie remains unchanged from when i once set it in my test.php page manually.
----编辑-----
我补充说:
if(!setcookie("TestCookie", "A", time()+60*60*24*30, "/")) {
echo "FAIL";
}
到 test.php 的最顶部，但是当我重新加载页面时，它永远不会显示更新的 cookie... 因为该 cookie 已经在没有/"参数的情况下设置，并且以后无法修改, 带有 ,"/" 参数.
to the very top of test.php, however when i reload the page, it never shows the updated cookie... because that cookie was already set without the ,"/" parameter, and cannot be modified later, with the ,"/" parameter.
在清除缓存并使用建议的代码后，我从浏览器中清除了我的 cookie，并为 set 方法使用了添加的参数，我能够从所有页面操作 cookie！非常感谢！！
After clearing the cache and working with the suggested code, i cleared my cookies from the browser and used the added parameter for the set method, i was able to manipulate the cookies from all pages!!! thank you so much!!
推荐答案
如果不给 setcookie() 添加 $path 值，则默认为 "当前目录".这意味着如果您从 /web/DEV/Classes/SetCookie.php 设置 cookie，则 cookie 将设置为 /web/DEV/Classes/ 以及以上任何内容该路径不会看到该 cookie.
If you don't add a $path value to setcookie(), it defaults to "the current directory". This means that if you set the cookie from /web/DEV/Classes/SetCookie.php, the cookie gets set to /web/DEV/Classes/, and anything above that path won't see that cookie.
要解决此问题，请将特定的 $path 添加到 setcookie.如果您的应用在域根目录 (example.com) 上运行，请使用 '/'.如果它位于子文件夹 (example.com/myapp/) 中，请使用 '/myapp/'
To fix this, add a specific $path to setcookie. If your app runs on the domain root (example.com), use '/'. If it's in a subfolder (example.com/myapp/), use '/myapp/'
setcookie("TestCookie", $var, time()+60*60*24*30, '/');
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