Php + mysql implement simple login register change password webpage _ php instance

This article mainly introduces php + mysql to implement simple login, registration, and password modification system, which has some reference value, interested friends can refer to the descriptions on the connection between php and mysql on many blogs. in order to master the query, modification, and insertion operations in mysql, this article describes how to use mysql to create a logon registration and password change webpage.

Here

1. log on-Query the content in the database and verify that the html information matches the database;
2. Register-That is, to insert the content in the database, register the account and password;
3. change the password-Modifies the content in the database.

I used eight php and html texts to create these three operations. for details, see the code section.
1. main interface index.html:

   
    
   Log on to the registration and password modification system homepage.