combine post and file request in php

Question

It's basically a webservice for android developers. Below is the function made by me to get the input request from url.

function  readInputStream() {
        $return_array = array();
        $body = @file_get_contents('php://input');
        if(get_magic_quotes_gpc()) 
        {
            $body = stripslashes($body);
        }
        // check if body is compressed or not
        if (strlen($body) < 18 || strcmp(substr($body,0,2),"\x1f\x8b")) 
        {
            $body = $body;
        } 
        else 
        {
            $tbody = $this->gzdecode($body);
            $body = $tbody;
        }
        if(!empty($body)) 
        {
            $return_array = json_decode($body, true);
        }
        
        return $return_array;
        
}

Now I want to combine post and file request.

I know that php://input will get all post requests. But i want to include file request as well in this function.

$body = @file_get_contents('php://input'); 

So, how can I merge post and file requests in $body variable in the above function?

I tried to like this it's not working,

$body = @file_get_contents('php://input'); 
$body .= @file_get_contents('php://fd'); 

Also tried like,

$body = @file_get_contents('php://input'); 
$body .= $_FILES;