$fotkes = '';
$a = 0;

print_r($_FILES);

foreach ($_FILES as $key => $value) {
    upload_file($file["name"], $file["tmp_name"]);
    //echo $key . "=>" . print_r($value) . "<br>";
}

echo $fotkes;
echo $a;

function upload_file($failas, $tmp_name) {
    if ($failas["error"] == 0) {
        $prefix = uniqid();
        $filename = $prefix . "_" . $failas;
        move_uploaded_file($tmp_name, "uploads/" . $filename);
        createthumb("uploads/" . $filename, "uploads/" . "thumb_" . $filename, 800, 800);
        $fotkes .= "thumb_" . $filename . "|";
        $a++;
    }
}