Quickly check if two files are identical

/**
 * Check if two files are identical.
 *
 * If you just need to find out if two files are identical, comparing file
 * hashes can be inefficient, especially on large files.  There's no
 * reason to read two whole files and do all the math if the
 * second byte of each file is different.  If you don't need to
 * store the hash value for later use, there may not be a need to
 * calculate the hash value just to compare files.This can be much faster.
 *
 * @link http://www.php.net/manual/en/function.md5-file.php#94494
 *
 * @param string $fileOne
 * @param string $fileTwo
 * @return boolean
 */
function identical($fileOne, $fileTwo)
{
    if (filetype($fileOne) !== filetype($fileTwo)) return false;
    if (filesize($fileOne) !== filesize($fileTwo)) return false;

    if (! $fp1 = fopen($fileOne, 'rb')) return false;

    if (! $fp2 = fopen($fileTwo, 'rb'))
    {
        fclose($fp1);
        return false;
    }

    $same = true;

    while (! feof($fp1) and ! feof($fp2))
        if (fread($fp1, 4096) !== fread($fp2, 4096))
        {
            $same = false;
            break;
        }

    if (feof($fp1) !== feof($fp2)) $same = false;

    fclose($fp1);
    fclose($fp2);

    return $same;
}