(PHP 4, PHP 5)
$HTTP_RAW_POST_DATA — Raw POST data
This feature was DEPRECATED in PHP 5.6.0, and REMOVED as of PHP 7.0.0.
$HTTP_RAW_POST_DATA contains the raw POST data. See always_populate_raw_post_data.
In general, php://input should be used instead of $HTTP_RAW_POST_DATA.
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https://secure.php.net/manual/en/reserved.variables.httprawpostdata.php