(PECL pecl_http 0.14.0-1.4.1)
HttpRequest::setRawPostData — Set raw post data
Set raw post data to send, overwriting previously set raw post data. Don't forget to specify a content type. Affects only POST and custom requests.
Only either post fields or raw post data can be used for each request. Raw post data has higher precedence and will be used even if post fields are set.
raw post data
Returns TRUE on success or FALSE on failure.