Converter bytes

 
function translate_bytes($bytes) {

    $b  = 1;
    $kb = 1024;
    $mb = 1024 * $kb;
    $gb = 1024 * $mb;
	$tb = 1024 * $gb;
	
	if ($bytes > $tb) return round($bytes/$tb, 1) . " TB";
    if ($bytes > $gb) return round($bytes/$gb, 1) . " GB";
    if ($bytes > $mb) return round($bytes/$mb, 1) . " MB";
    if ($bytes > $kb) return round($bytes/$kb, 1) . " KB";

    return round($bytes, 1) . " bytes";
}