$http_raw_post_data function usage

Variables sent via HTTP POST will not appear in the URL.

When we cannot receive the information from the page using $_POST, we can use php://input to receive the value. So what is the difference between the two?

First of all, $_POST and php://input $HTTP_RAW_POST_DATA is empty when the value can be obtained;

$http_raw_post_data is a global variable built into PHP. It is used by PHP to fill the POST data into the variable $http_raw_post_data as it is when the Content-Type cannot be recognized. It also cannot read POST data whose Content-Type is multipart/form-data. You need to set the always_populate_raw_post_data value in php.ini to On so that PHP will always fill in the POST data into the variable $http_raw_post_data.

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The above introduces the use of the $http_raw_post_data function, including the relevant aspects. I hope it will be helpful to friends who are interested in PHP tutorials.