How to change database password in php

When programming with Php, sometimes you need to change the database connection password. This article will introduce how to change the database password and how to change the database connection password in Php.

1. Modify the database password

Modifying the database password is divided into two steps: modify the password of the database user, and modify the password in the database connection configuration file.

1. Modify the database user password

First log in to the database and find the user who needs to change the password.

Execute the following command:

mysql> update user set password=PASSWORD('newpassword') where user='youruser';

where youruser is the user name whose password needs to be changed, and newpassword is the new password.

After the modification is completed, execute the following command:

mysql> flush privileges;

2. Modify the database connection configuration file

In the Php program, the database connection configuration file is usually config.php. Open the file and find the following code:

$connect = mysql_connect("localhost","root","oldpassword"); 
mysql_select_db("yourdatabase",$connect);

where oldpassword is the current password, change it to a new password.

2. Modify the database connection password in Php

In Php, you can use the mysqli extension library to connect to the database. The mysqli class provides a method to modify the database connection password. The specific operations are as follows:

1. Create a mysqli object

$db = new mysqli('localhost', 'youruser', 'oldpassword', 'yourdatabase');

where youruser is the user name that needs to be connected, and oldpassword is the current password. yourdatabase is the name of the database that needs to be connected.

2. Change the password

Execute the following code:

$db->query("SET PASSWORD = PASSWORD('newpassword')");

where newpassword is the new password.

3. Close the connection

Execute the following code:

$db->close();

After the modification is completed, change the password in config.php to the new password.

Summary:

The above are the detailed steps for changing the database password and changing the database connection password in Php. Password modification can be easily completed whether on the command line or in Php. It should be noted that the password should not be too simple. It is best to include letters, numbers and symbols to improve security.

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