When using xml-rpc, server side will get the data from client with php://input method instead of $_POST. Hence today we will discuss php://input.PHP official manual has below explanation to php://input:“php://input allows you to read raw POST data. It is a less memory intensive alternative to $HTTP_RAW_POST_DATA and does not need any special php.ini directives. php://input is not available with enctype=”multipart/form-data”.Here we understand the above statement from 3 aspects:Read POST dataCannot use multipart/form-data typephp://input...