How to use php encryption and decryption utility classes

This article introduces the relevant knowledge of "how to use php encryption and decryption utility class". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

The password registered by the user is generally not saved in plain text, so you have to add a secret first. The simplest thing, of course, is to call the md5 function in the database sql statement to encrypt the user's password. Here is an encryption and decryption class. This class is a useful tool if you want to retrieve the original password for the user when he or she forgets his or her password. Of course, this encryption class can also be used for other purposes.

The copy code is as follows: