How to change database password in php

How to change the database password is a very basic and important issue in PHP development. The security of database passwords is related to the security of the entire database system, so you should always pay attention to the protection and security of passwords at all times. The following article will introduce in detail how to change the database password in PHP.

1. Modify the MySQL database password

MySQL database is one of the most widely used database management systems, so here we first introduce how to modify the MySQL database password.

1. Use PhpMyAdmin to change the MySQL password

PhpMyAdmin is a free and open source tool for managing MySQL databases. The steps to use PhpMyAdmin to change the MySQL database password are as follows:

Step 1: Log in to the PhpMyAdmin management interface

Use the administrator account and password to log in to the PhpMyAdmin management interface.

Step 2: Select the ‘User Account’ tab

Click the ‘User Account’ tab in the PhpMyAdmin management interface.

Step 3: Select the corresponding user account

Select the user account that needs to change the password and click the ‘Edit’ button.

Step 4: Change Password

In the 'Edit User Account' interface, change the 'Password' column to a new password, and click the 'OK' button to complete the password change.

2. Use the command line to change the MySQL password

In addition to using the PhpMyAdmin management interface to change the MySQL password, you can also operate through the command line. The following are the steps to change the MySQL password through the command line.

Step 1: Log in to the MySQL server

Use the administrator account and password to log in to the MySQL server.

Step 2: Use the ‘USE mysql;’ command to select the MySQL database

Enter the ‘USE mysql;’ command on the command line to select the MySQL database.

Step 3: Use the 'UPDATE' command to change the password

Enter the 'UPDATE user SET authentication_string = password("new_password") WHERE user = "root";' command in the command line, and Change the password of the root user to the new password.

2. Modify SQLite database password

SQLite is a lightweight database management system and an open source project. The SQLite database file is essentially an ordinary file, so if you need to change the password of the SQLite database, you need to use specific tools or command line methods.

The following are two ways to change the password of the SQLite database:

1. Use SQLite Expert to change the password

SQLite Expert is a graphical tool for managing SQLite databases. The steps to use SQLite Expert to change the SQLite database password are as follows:

Step 1: Open SQLite Expert

Open the SQLite Expert tool and select the SQLite database file whose password needs to be modified.

Step 2: Select the ‘Database > Encrypt Database’ option

Select the ‘Database > Encrypt Database’ option in the SQLite Expert menu bar.

Step 3: Enter the new password

In the ‘Encrypt Database’ pop-up box, enter the new password and click the ‘OK’ button to complete the password change.

2. Use the command line to change the password

Enter the following command on the command line:

sqlite3 database_name
pragma key = 'new_password';
.quit

Among them, database_name is the name of the database file whose password needs to be changed, and new_password is the new password.

3. Modify the PostgreSQL database password

PostgreSQL is an advanced relational database management system. Like MySQL, it is also an open source software. The following are the steps to change the PostgreSQL database password:

Step 1: Use the command line to connect to the PostgreSQL database

Enter the following command on the command line to connect to the PostgreSQL database:

psql - U postgres -d postgres

Among them, the -U parameter is the user name and the -d parameter is the database name.

Step 2: Use the 'ALTER ROLE' command to change the password

Enter the following command on the command line to change the password:

ALTER ROLE postgres PASSWORD 'new_password';

Among them, postgres is the user name whose password needs to be changed, and new_password is the new password.

Summary

No matter what the situation is, you need to be cautious when changing the database password. If the password is improper or leaked, it will most likely lead to privacy, security and other issues. Therefore, you must think carefully before changing your password and take adequate security measures to ensure the security of your database password.

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