使用 PHP 将字符串转换为二进制然后再返回 [英] Convert string to binary then back again using PHP

问题描述

有没有办法在标准 PHP 库中将字符串转换为二进制然后再返回?

Is there a way to convert a string to binary then back again in the standard PHP library?

为了澄清我想要做的是将密码存储在数据库中.我将首先使用哈希函数对其进行转换，然后最终将其存储为二进制.

To clarify what I'm trying to do is store a password on a database. I'm going to convert it first using a hash function then eventually store it as binary.

我发现最好的方法是使用这个功能.似乎同时以二进制形式进行哈希和输出.

I've found the best way is to use this function. Seems to hash and output in binary at the same time.

http://php.net/manual/en/function.hash-hmac.php

推荐答案

你想使用 pack 和 base_convert.

// Convert a string into binary
// Should output: 0101001101110100011000010110001101101011
$value = unpack('H*', "Stack");
echo base_convert($value[1], 16, 2);

// Convert binary into a string
// Should output: Stack
echo pack('H*', base_convert('0101001101110100011000010110001101101011', 2, 16));

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