function generateRandomString($length) {
    $characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
    $randomString = '';
    for ($i = 0; $i < $length; $i++) {
        $randomString .= $characters[rand(0, strlen($characters) - 1)];
    }
    return $randomString;
}
$salt = generateRandomString(16);
$sha = 'SHA';
$hash = hash('sha256', hash('sha256', $pass1) . $salt);
$encrypt = '$' . $sha . '$' . $salt . '$' . $hash;