Read json input

Hi! 
How about features for working php with AngularJS? 
AngularJS sends a request in json format. In php it is processed through `php://input`

```
function readInput(){
   $data = file_get_contents("php://input");
   $objData = json_decode($data, true);
   if (!empty($sData)) foreach($sData as $key => $value)
      $_POST[$key] = $value;
}
```
