$HTTP_RAW_POST_DATA

原生POST数据

说明

Warning

This feature wasDEPRECATEDin PHP 5.6.0, andREMOVEDas of PHP 7.0.0.

$HTTP_RAW_POST_DATA包含 POST 提交的原始数据。参见always_populate_raw_post_data

一般而言，使用php://input代替$HTTP_RAW_POST_DATA。

To get the Raw Post Data:
<?php $postdata = file_get_contents("php://input"); ?>
Please see the notes here:
http://us.php.net/manual/en/wrappers.php.php

what is exaclty raw POST data?
Answer:
$_POST can be said as and outcome after splitting the $HTTP_RAW_POST_DATA, php splits the raw post data and formats in the way we see it in the $_POST For example:
  $HTTP_RAW_POST_DATA looks something like this
key1=value1&key2=value2
  then $_POST would look like this:
$_POST = array(
  "key1" => "value1",
  "key2" => "value2",);

At PHP 5.6+ you can suppress the Deprecated messages by setting:
always_populate_raw_post_data = -1
More information here: https://bugs.php.net/bug.php?id=66763