问题描述

阅读答案后我有这个问题 这里，有什么区别?

I have this question after reading the answer here, what's the difference at all?

是否可以使用 html 提交原始 POST ?

Is it possible to submit raw POST with html ?

推荐答案

我们可以将表单提交分为三种情况:

We can divide form submissions in three cases:

1. 内容类型为 application/x-www-form-urlencoded 的提交
2. 内容类型为 multipart/form-data
的提交
3. 其他提交.

在情况 1 和 3 中，$HTTP_RAW_POST_DATA 包含原始帖子数据(除非选项是 always_populate_raw_post_data 设置为 false，在这种情况 $HTTP_RAW_POST_DATA 在情况 1) 中为空，即数据与客户端(通常是浏览器)发送的数据完全相同.在第 1 种情况下，数据的形式如

In cases 1 and 3, $HTTP_RAW_POST_DATA contains the raw post data (except if the option is always_populate_raw_post_data is set to false, in which case $HTTP_RAW_POST_DATA is empty in case 1), i.e., the data exactly as the client (usually the browser) has sent it. In case, 1, the data has a form such as

key1=value1&key2=value2&key3[]=value3.1&key3[]=value3.2

PHP 自动解析这个，所以 $_POST 变成:

PHP automatically parses this, so that $_POST becomes:

$_POST = array(
    "key1" => "value1",
    "key2" => "value2",
    "key3" => array("value3.1", "value3.2");
)

原始数据的内容也可以通过php://input访问，即使在always_populate_raw_post_data设置为false的情况1>.尤其是，file_get_contents("php://input") 给出了 $HTTP_RAW_POST_DATA 已经或应该拥有的相同数据.

The contents of the raw data can also be access through php://input, even in case 1 when always_populate_raw_post_data is set to false. In particular, file_get_contents("php://input") gives the same data $HTTP_RAW_POST_DATA has or would have.

在情况 3 中，POST 数据是任意的，$_POST 将是一个空数组，并且 $HTTP_RAW_POST_DATA 将始终被填充.

In case 3, in which the POST data is arbitrary, $_POST will be an empty array and $HTTP_RAW_POST_DATA will always be populated.

案例 2 是一个特殊的案例.在这种情况下，PHP 将解析数据，$_POST 将获取不是上传文件的字段的内容，而是 php://input 和 $HTTP_RAW_POST_DATA 将不可用.

Case 2 is a special one. In that case, PHP will parse the data and $_POST will get the content of the fields which are not uploaded files, but php://input and $HTTP_RAW_POST_DATA will be unavailable.

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