编码和解码函数

$data = "VGhpcyBpcyBhIAptdWx0aS1saW5lIG1lc3NhZ2UK";//解码前的值
print ($data);
print(base64_decode($data)); //进行解码
?>

print("

---

");
$text = "这是一个多行信息";
print ($text);
print(base64_encode($text)); //编码
?>