Implement user login, account management and logging based on PHP and MySQL

In today's Internet era, website security and user privacy protection are crucial. In order to ensure the security of the website, user login, account management and logging are essential functions. This article will introduce how to implement user login, account management and logging based on PHP and MySQL.

1. Implementation of user login function

User login is one of the most basic functions of the website. Users must enter the correct user name and password before they can log in. This article will use PHP and MySQL languages ​​to implement the user login function.

First, we need to create a user login page, where the user enters their account number and password. When the user clicks the login button, the page will submit the form through POST and send the account number and password entered by the user to the server for verification.

Secondly, verify whether the account number and password entered by the user are correct. Compare user input with information stored in the database through the user table in the MySQL database. If the user's input matches the information stored in the database, the information entered by the user is considered correct and the user can log in to the website. If the user's input does not match the information stored in the database, the user needs to be prompted for an input error and try to log in again.

Finally, after successful login, the user information needs to be saved to SESSION for permission verification on other pages. At the same time, in order to improve user experience, it is recommended to jump to the homepage or the last visited page after successful login.

2. Implementation of account management functions

Account management functions such as user registration, password modification, and password retrieval are one of the common functions on the website. This article will implement account management functions through PHP and MySQL.

First, we need to create a user registration page. The user needs to enter information such as account number and password. When the user clicks the submit button, the form will be submitted through POST and the data entered by the user will be stored in the MySQL database.

Secondly, changing password is a common function, and users need to provide the original password and new password. When the user enters complete information and clicks the submit button, the page submits the form through POST and updates the new password to the database. At the same time, it is necessary to verify whether the original password entered by the user is correct to prevent others from stealing the account information.

Finally, when a user forgets their password, a password retrieval function needs to be provided. Send an email or text message containing a password reset link based on the user's registered email or mobile phone number. When the user clicks on the link, the form can be submitted via POST, the validity of the link is verified, and the new password is saved to the database.

3. Implementation of logging function

In order to protect the security of the website, all user behaviors on the website must be recorded, including login, registration, password change and other operations. This article will use PHP and MySQL to implement the logging function.

First, we need to create a log table in the MySQL database to save user operation records. The table structure contains fields such as time, user ID, IP address, operation type and details.

Secondly, when the user performs any operation, relevant information is written to the log table. For example, when a user logs in or changes their password, save the user ID, time, action type, IP address and details to a log table.

Finally, in order to facilitate data query and analysis, it is recommended to clean the data in the log table regularly to avoid excessive data volume and affecting query performance.

To sum up, this article introduces how to use PHP and MySQL to implement user login, account management and logging functions. By implementing these functions, the security of the website and the privacy protection of users can be guaranteed.

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