How to obtain json data in post using php

I suddenly thought that I had used flash to spread the binary image to php. I got it with $ GLOBALS ['HTTP _ RAW_POST_DATA.
So I checked it in depth, the original PHP by default only recognize the application/x-www.form-urlencoded standard data type, therefore, the text, xml, soap, or application/octet-stream contents cannot be parsed. If you use the $ _ POST array to receive the content, it will fail! Therefore, the prototype is retained and sent to $ GLOBALS ['HTTP _ RAW_POST_DATA '] for receiving.

HTTP_RAW_POST_DATA of php
The Content-Type = text/xml Type is used to submit an xml document Content to the php server. How can I obtain the POST data.
The RAW/uninterpreted http post information can be accessed: $ GLOBALS ['HTTP _ RAW_POST_DATA '] This is useful in cases where the post Content-Type is not something PHP understands (such as text/xml ).
Because PHP only recognizes the application/x-www.form-urlencoded standard data type by default, the content of the type such as text/xml cannot be parsed as $ _ POST array, so the prototype is retained, it is sent to $ GLOBALS ['HTTP _ RAW_POST_DATA '] for receiving.
Another php: // input can also implement this function.
Php: // input allows reading original POST data. Compared with $ HTTP_RAW_POST_DATA, it puts less pressure on the memory and does not require any special php. ini settings. Php: // input cannot be used for enctype = "multipart/form-data ".

Application

A.htm
Copy codeThe Code is as follows:
<Form action = "post. php" method = "post">
<Input type = "text" name = "user">
<Input type = "password" name = "password">
<Input type = "submit">
</Form>

Post. php
Copy codeThe Code is as follows:
<? Echo file_get_contents ("php: // input");?>