Detailed graphic explanation of the difference between $GLOBALS['HTTP_RAW_POST_DATA'] and $_POST in PHP

This article mainly introduces the difference between $GLOBALS['HTTP_RAW_POST_DATA'] and $_POST in PHP. It analyzes the functions and usage of $GLOBALS['HTTP_RAW_POST_DATA'] and $_POST based on specific examples. It needs Friends can refer to the

details as follows:

$_POST: An array composed of variables passed through the HTTP POST method. is an automatic global variable.
$GLOBALS['HTTP_RAW_POST_DATA'] : Always generate $HTTP_RAW_POST_DATA variable containing the original POST data. This variable is only generated when data of an unrecognized MIME type is encountered. $HTTP_RAW_POST_DATA is not available for enctype="multipart/form-data" form data.

That is to say, basically $GLOBALS['HTTP_RAW_POST_DATA'] and $_POST are the same.
But if the posted data is not recognized by PHP, you can use $GLOBALS['HTTP_RAW_POST_DATA'] to receive it, such as text/xml or soap, etc.

Additional explanation: The data type recognized by PHP by default is the application/x-www.form-urlencoded standard data type.

This is what the manual says:

Always generate variables containing the original POST data. Otherwise, this variable is generated only when data of an unrecognized MIME type is encountered. However, a better way to access the raw POST data is php://input. $HTTP_RAW_POST_DATA is not available for enctype="multipart/form-data" form data.

Question: Does $HTTP_RAW_POST_DATA == $_POST?

According to the manual, the answer should be no.
If they are different, what is their difference?

I know the answer, as follows:

The RAW / uninterpreted HTTP POST information can be accessed with:
$GLOBALS['HTTP_RAW_POST_DATA']
This is useful in cases where the post Content-Type is not something PHP understands (such as text/xml).

That is, basically $GLOBALS['HTTP_RAW_POST_DATA'] and $_POST are the same. But if the posted data is not recognized by PHP, you can use $GLOBALS['HTTP_RAW_POST_DATA'] to receive it, such as text/xml or soap, etc..

The data type recognized by PHP by default is the standard data type of application/x-www.form-urlencoded

Use Content-Type=text/xml type to submit the content of an xml document to PHP server, how to obtain this POST data.

The RAW / uninterpreted HTTP POST information can be accessed with: $GLOBALS['HTTP_RAW_POST_DATA'] This is useful in cases where the post Content-Type is not something PHP understands (such as text/xml ).

Since PHP only recognizes the application/x-www.form-urlencoded standard data type by default, the content such as text/xml cannot be parsed into the $_POST array, so the prototype is retained. , hand it over to $GLOBALS['HTTP_RAW_POST_DATA'] to receive.

There is also another php://input that can also implement this function

php://input allows reading the original data of POST. It puts less pressure on memory than $HTTP_RAW_POST_DATA and does not require any special php.ini settings. php://input cannot be used with enctype="multipart/form-data".

Application:

a.htm:

<form action="post.php" method="post">
<input type="text" name="user">
<input type="password" name="password">
<input type="submit">
</form>

post.php:

<? echo file_get_contents("php://input"); ?>

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