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To install a website in a simple way, be it WordPress, Joomla or PrestaShop, in you can use the , these installers will take care of the process of creation and connection to the database.
However, if you are going to manually install your website, at some point in the process it will ask you to indicate the connection data with the database.
The connection details requested are the server or host of the database, the name of the database and your username and password. To create a database and assign permissions to a user you can review the article, however we are missing the hostname.
In the following image we see the process, in one of the steps as part of the installation it asks us for the database connection information.
Database Host Name
In the name of the server of your database will always be localhost.
However, if you are in another provider, check the control panel help or in the emails sent when creating your account.
Locate connection data on installed sites
If you already have any sites installed on your hosting account, then the database server name will be the same for new sites on the same account.
In the case of WordPress
If you already have a website wordpress installed and want to see what data it is using for the database connection, you can do so by locating the file:
/wp-config.php
Inside this file you will see that you have the connection data, for example:
In the case of Joomla
If you have a website in Joomla and you want to find out the connection data, you can locate the file:
/config.php
Inside this file you will see that you have the connection data, for example:
In the case of PrestaShop
If you have a website in PrestaShop and you want to find out the connection data with the database, you can locate the following file:
/app/config/parameters.php
When editing this file you will see the connection data similar to the one shown in the following image:
conclusion
As you have been able to verify, it is very usual that the database server is localhost, otherwise you can check the documentation of your hosting provider or find out the host by checking the connection file of a website that you already have installed.
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WordPress technical support at and regular speaker at Meetups and WordCamps in America.