在阅读答案后，我有这个问题这里，有什么不同？
是否可以使用html提交原始POST？
解决方案我们可以在三种情况下分割表单提交：
在情况1和3中， $ HTTP_RAW_POST_DATA 包含原始发布数据（除非选项为 always_populate_raw_post_data 设置为 false ，在这种情况下， $ HTTP_RAW_POST_DATA 在情况1）中为空，即与客户端（通常是浏览器）发送的数据完全相同。在情况1中，数据具有诸如以下形式： key1 = value1& key2 = value2& key3 [] = value3。 1& key3 [] = value3.2
PHP会自动解析它，所以 $ _ POST 变成：
$ _ POST = array（key1=> ;value1，key2=>value2，key3=>数组（value3.1，value3.2）; ）原始数据的内容也可以通过 php：//输入，即使在情况1中，当 always_populate_raw_post_data 被设置为 false 时。特别是， file_get_contents（php：// input）给出了相同的数据 $ HTTP_RAW_POST_DATA 已经或将要拥有的数据。
在情况3中，POST数据是任意的， $ _ POST 将是一个空数组， $ HTTP_RAW_POST_DATA 将始终填充。
案例2是一个特例。在这种情况下，PHP将解析数据，并且 $ _ POST 将获取未上传文件的字段内容，但是 php：// input 和 $ HTTP_RAW_POST_DATA 将不可用。
I have this question after reading the answer here, what's the difference at all?
Is it possible to submit raw POST with html ?
解决方案We can divide form submissions in three cases:
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[]=value3.2PHP automatically parses this, so that $_POST becomes:
$_POST = array( "key1" => "value1", "key2" => "value2", "key3" => array("value3.1", "value3.2"); )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.
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.
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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