php - I have trouble with Mysql Encoding

Question

I'm using phpseclib for encrypting data, My MySQL database's encoding is utf8-general-ci. when I encrypt an string and save it to the table some of characters appears in '?' charachter. This make mistake when I want to decrypt it. What encoding should I use to have all of the characters? please help.

Answer 1

如果您将数据加密为二进制字符串，则不能再将其存储在 UTF8 编码字符串中，因为某些二进制值/序列不是有效的 UTF8。

只需在存储之前对您的字符串进行 base64 编码（或将列类型更改为二进制类型），事情应该会更好。