Save Image From Flash, Send It To PHP And Return A URL String To Flash?

I use this code to convert an image to a BitmapData and store a JPG in a ByteArray.

import com.adobe.images.JPGEncoder;
var jpgSource:BitmapData = new BitmapData (img_mc.width, img_mc.height);
jpgSource.draw(img_mc);

[code]....

Now, I want to do the following:

1. send the ByteArray to PHP;

2. PHP must store a physical image_id.jpg on server;

3. then PHP must return the URL of the image to Flash;

The first lines of PHP could be:

if (isset($GLOBALS["HTTP_RAW_POST_DATA"]))
{
// get bytearray
$jpg = $GLOBALS["HTTP_RAW_POST_DATA"];

[code]....