javascript php setcookie 不适用于 ajax 调用
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/5636506/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
php setcookie not working with ajax call
提问by adam
I have a page, test.php, with the following code:
我有一个页面 test.php，其中包含以下代码：
<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>
I have a page, SetCookie.php, with the following code:
我有一个页面 SetCookie.php，其中包含以下代码：
<?php
$var = "THIS IS A TEST";
setcookie("TestCookie", $var, time()+60*60*24*30);
?>
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.
当单击 test.php 的按钮时，我使用 XMLHttpRequest 调用我的 SetCookie.php 页面。该页面执行，因为如果我向它添加一个回声，我会在 xmlhttp 响应中得到它。但是，TestCookie 似乎没有被设置。
If in text.php, i do the same command found in SetCookie.php, the cookie is then set accordingly for all browser sessions.
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相应地设置 cookie。
Even after i close / open the browser, the cookie remains unchanged from when i once set it in my test.php page manually.
即使在我关闭/打开浏览器之后，cookie 仍然保持不变，因为我曾经在我的 test.php 页面中手动设置过它。
----EDIT-----
- - 编辑 - - -
I added:
我补充说：
if(!setcookie("TestCookie", "A", time()+60*60*24*30, "/")) {
echo "FAIL";
}
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.
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 已经设置为没有 ,"/" 参数，并且以后无法修改，使用 ,"/ “ 范围。
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!!
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 并使用了 set 方法的添加参数，我能够从所有页面操作 cookie！太感谢了！！
回答by Joel L
If you don't add a $pathvalue to setcookie(), it defaults to "the current directory". This means that if you set the cookie from /web/DEV/Classes/SetCookie.php, the cookie gets set to /web/DEV/Classes/, and anything above that path won't see that cookie.
如果不向 中添加$path值setcookie()，则默认为“当前目录”。这意味着，如果您从 设置 cookie /web/DEV/Classes/SetCookie.php，则 cookie 将设置为/web/DEV/Classes/，并且该路径之上的任何内容都不会看到该 cookie。
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/'
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 (example.com) 上运行，请使用'/'. 如果它在子文件夹 (example.com/myapp/) 中，请使用'/myapp/'
setcookie("TestCookie", $var, time()+60*60*24*30, '/');
回答by Sabeen Malik
I think you should look into the path parameter of the setcookie. Set it to "/" , so that it is accessible from across all directories/pages of the site.
我认为您应该查看 setcookie 的路径参数。将其设置为 "/" ，以便可以从站点的所有目录/页面访问它。
