apache jquery ajax POST 大小限制？
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jquery ajax POST size limit?
提问by twh
I'm using jquery to send text back to my ajax.php controller like this:
我正在使用 jquery 将文本发送回我的 ajax.php 控制器，如下所示：
var dataString = "1234567890";
$.post(
'../ajax/save',
{ data: dataString },
function(){
alert("success");
},
"text");
It works well, that is until the dataString gets to be ~3500 characters long. At that upper limit (~3.5 KB), the $_POST received by ajax.php is NULL. Why?
它运行良好，直到 dataString 长度达到 ~3500 个字符为止。在该上限（~3.5 KB）下，ajax.php 收到的 $_POST 为 NULL。为什么？
(My php.ini post_max_size = 64M, so it's not that.)
（我的 php.ini post_max_size = 64M，所以不是那个。）
My setup: Apache 2.2, PHP 5.2.9, and CodeIgniter 1.7.1.
我的设置：Apache 2.2、PHP 5.2.9 和 CodeIgniter 1.7.1。
采纳答案by twh
I figured it out. For some reason NetBeans' debugger tells me $_POST['data'] is null, but it's not. To manually determine the size of the $_POSTreceived, I used these calls:
我想到了。出于某种原因，NetBeans 的调试器告诉我 $_POST['data'] 为空，但事实并非如此。为了手动确定$_POST接收的大小，我使用了以下调用：
$request = http_build_query($_POST);
$size = strlen($request);
Also, I was putting $_POST['data'] into CodeIgniter's session:
另外，我将 $_POST['data'] 放入 CodeIgniter 的会话中：
$event_array = array('event' => $_POST['data']);
$this->session->set_userdata($event_array);
Which was coming up empty leading me to further believe that $_POST was empty. But the problem was instead $this->session, which apparently has a 4K size limit (according to this post).
这是空的，导致我进一步相信 $_POST 是空的。但问题是$this->session，它显然有 4K 大小限制（根据这篇文章）。
