PHP source code to modify database configuration file

In PHP development, it is very common to use a database, and for different environments and needs, we need to modify the database configuration file. The following will introduce how to modify the database configuration file in the PHP source code.

Step one: Open the php.ini file

First you need to enter the php.ini configuration file. This file may be stored in different paths in different systems. For various PHP versions installed under Linux, you can use the following command to search:

find / -name "php.ini"

Of course, if you know the path where PHP is installed, you can locate the php.ini file in that path.

For Windows systems, the php.ini file can be found in the php installation directory.

Step 2: Locate the database configuration information

After opening the php.ini file, you can search for the keyword "mysql" to quickly locate the mysql configuration information. Here we take an example to modify the mysqli database configuration information and locate the following configuration information:

[mysqli] mysqli.allow_local_infile = On mysqli.allow_persistent = On mysqli.default_port = 3306 mysqli.max_persistent = -1 mysqli.max_links = -1 mysqli.default_host = mysqli.default_user = mysqli.default_pw = mysqli.reconnect = Off

Here you can see the default values of all mysqli configuration information, and here we can modify the corresponding parameters. For example, if you need to modify the user name, password and other information for connecting to the database, you can add the modified values under the corresponding parameters, as follows:

[mysqli] mysqli.allow_local_infile = On mysqli.allow_persistent = On mysqli.default_port = 3306 mysqli.max_persistent = -1 mysqli.max_links = -1 mysqli.default_host = mysqli.default_user = root mysqli.default_pw = password mysqli.reconnect = Off

As above, we have added the account and password information for connecting to the database.

Step 3: Save and restart the php service

After the configuration is completed, remember to save and restart the php service, so that the modified configuration information will be automatically used when calling the database in the php code.

For web servers such as Apache, you can use the following command to restart:

sudo service apache2 restart

For web servers such as Nginx, you can use the following command to restart:

sudo service nginx restart

Summary

In PHP development, using a database is essential. Modifying database configuration information is also a very common operation. Modifying the database configuration information in the PHP source code allows us to quickly modify the corresponding parameter values without the need to manually modify the php.ini file. This can avoid errors caused by manual modification and also improve our work efficiency.

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