<?php

$uploaded = array();

foreach ( $_FILES as $id => $file )
{
    $uploadfile = $file['tmp_name'] . "_" . $id;

    if ( move_uploaded_file($file['tmp_name'], $uploadfile) )
    {
        $file['tmp_name'] = $uploadfile;
        $uploaded[] = $file;
    }
}

echo json_encode($uploaded);