How to install and configure PHP
PHP is a general-purpose scripting language well-suited for Web development since PHP scripts can be embedded into HTML. This guide explains how to install and configure PHP in an Ubuntu System with Apache2 and MySQL.
Before installing PHP you should install Apache (or a preferred web server) and a database service such as MySQL.
- To install the Apache package, please refer to our Apache guide.
- To install and configure a MySQL database service, refer to our MySQL guide.
PHP is available on Ubuntu Linux, but unlike Python (which comes pre-installed), must be manually installed.
To install PHP – and the Apache PHP module – you can enter the following command into a terminal prompt:
sudo apt install php libapache2-mod-php
Install optional packages
The following packages are optional, and can be installed if you need them for your setup.
You can run PHP scripts via the Command Line Interface (CLI). To do this, you must first install the
php-clipackage. You can install it by running the following command:
sudo apt install php-cli
You can also execute PHP scripts without installing the Apache PHP module. To accomplish this, you should install the
php-cgipackage via this command:
sudo apt install php-cgi
To use MySQL with PHP you should install the
php-mysqlpackage, like so:
sudo apt install php-mysql
Similarly, to use PostgreSQL with PHP you should install the
sudo apt install php-pgsql
If you have installed the
php-cgi packages, you can run PHP scripts from your web browser. If you have installed the
php-cli package, you can run PHP scripts at a terminal prompt.
By default, when
libapache2-mod-php is installed, the Apache2 web server is configured to run PHP scripts using this module. First, verify if the files
/etc/apache2/mods-enabled/php8.*.load exist. If they do not exist, you can enable the module using the
Once you have installed the PHP-related packages and enabled the Apache PHP module, you should restart the Apache2 web server to run PHP scripts, by running the following command:
sudo systemctl restart apache2.service
Test your setup
To verify your installation, you can run the following PHP
You can save the content in a file –
phpinfo.php for example – and place it under the
DocumentRoot directory of the Apache2 web server. Pointing your browser to
http://hostname/phpinfo.php will display the values of various PHP configuration parameters.
For more in depth information see the php.net documentation.
There are a plethora of books on PHP 7 and PHP 8. A good book from O’Reilly is Learning PHP, which includes an exploration of PHP 7’s enhancements to the language.
Also, see the Apache MySQL PHP Ubuntu Wiki page for more information.