Better way save password in mysql which can be decrypted also using php

Question

I am currently using md5 function to encrypt my password and save to mysql db which can not be decrypted.

Now my user want that when they forgot password, they shou

Answer 1

Don't do that, it will compromise your security! The whole idea of one way encryption is that if your database is hacked you won't face the problem that all your users passwords will be known alongside with their email addresses!