在 PHP 中检测 base64 编码?

2022-01-21 00:00:00 encode base64 php

有没有办法检测一个字符串是否在 PHP 中被 base64_encoded() ?

Is there some way to detect if a string has been base64_encoded() in PHP?

我们正在将一些存储从纯文本转换为 base64,其中一部分存储在需要更新的 cookie 中.如果文本尚未编码,我想重置他们的 cookie,否则不要管它.

We're converting some storage from plain text to base64 and part of it lives in a cookie that needs to be updated. I'd like to reset their cookie if the text has not yet been encoded, otherwise leave it alone.

推荐答案

function is_base64_encoded($data)
{
    if (preg_match('%^[a-zA-Z0-9/+]*={0,2}$%', $data)) {
       return TRUE;
    } else {
       return FALSE;
    }
};

is_base64_encoded("iash21iawhdj98UH3"); // true
is_base64_encoded("#iu3498r"); // false
is_base64_encoded("asiudfh9w=8uihf"); // false
is_base64_encoded("a398UIhnj43f/1!+sadfh3w84hduihhjw=="); // false

http://php.net/manual/en/function.base64-decode.php#81425

相关文章