如何使用cURL发送原始POST数据？ (PHP)

虽然这很可能是发送方的问题(它没有发送正确的请求),但也可能是由接收PHP脚本中的配置错误引起的.也就是说,即使请求是正确的,接收器也可能没有HTTP_RAW_POST_DATA可用.

见：http://www.php.net/manual/en/ini.core.php#ini.always-populate-raw-post-data

Always populate the $HTTP_RAW_POST_DATA containing the raw POST data.
Otherwise,the variable is populated only with unrecognized MIME type
of the data. However,the preferred method for accessing the raw POST
data is php://input. $HTTP_RAW_POST_DATA is not available with
enctype=”multipart/form-data”.

因此,首先要检查的是是否确实填充了$HTTP_RAW_POST_DATA,从上面的页面要求：

> .ini变量always_populate_raw_post_data为True,
>或POST与POST处理程序无法识别的Content-Type一起发送(也许可以使用“text / raw”)

此时,正确的发送数据的方式将是

curl_setopt($handle,urlencode('Raw POST data'));

但是,请注意,接收这些数据的推荐方法根本不是依赖于$HTTP_RAW_POST_DATA,而是要读取虚拟文件php：// input的内容.

php://input is a read-only stream that allows you to read raw data
from the request body. In the case of POST requests,it is preferable
to use php://input instead of $HTTP_RAW_POST_DATA as it does not depend on special php.ini directives. Moreover,for those cases where $HTTP_RAW_POST_DATA is not populated by default,it is a potentially less memory intensive alternative to activating always_populate_raw_post_data.