PHP is the language that is mostly used for server-side programming. It is executed, run, and must be installed on the webserver. Since it is an interpreted language, it doesn’t need any compiler. PHP handles the interaction between the front-end of the web pages and the back-end servers or databases.
Installation of PHP on Ubuntu 20.04 LTS
Before getting started with the installation of PHP, first, always update Ubuntu’s package repository.
$ sudo apt update
After updating Ubuntu’s package repository, install the PHP by typing the command given below.
$ sudo apt install PHP
It will take a while to download and install the latest stable version of PHP.
Verify the installation of PHP on Ubuntu
Once it is installed successfully, you can verify and check the version of PHP by typing the “php -v” command.
$ php -v
Alright! You can now see that version 7.4.3 of PHP is installed on Ubuntu 20.04 LTS.
Install Apache PHP module
If you want to install other requisite software like Apache PHP Module with it, then type the command below.
$ sudo apt install libapache2-mod-php
Now restart the Apache server for the changes to take effect, and if you want to load the PHP module, type the following command.
$ sudo systemctl restart apache2
If it is restarted without throwing any error, you can verify it by checking the status using the command given below.
$ sudo systemctl status apache2
If it is active and running, then you are ready to go.
Find and Install Extensions of PHP on Ubuntu 20.04
In case you want to install some further extensions of PHP, you can type the following command in the terminal.
$ sudo apt install php-
Then, hit the tab button twice on your keyboard to see the available extensions of PHP.
For example, if we want to install the PHP MySQL extension, the command would be like this:
$ sudo apt install php-mysql
It will ask you to take additional disk space for the extension to install, then press “y” to continue the process.
Downloading and installation of the PHP MySQL extension will start.
This is how you can find and install any extension of PHP of your desire.
Conclusion
This is the simplest way to install and get started with the PHP on Ubuntu 20.04 LTS. In this post, we have explained the installation of PHP and its extensions.
PHP is a general-purpose scripting language suited for Web development. PHP scripts can be embedded into HTML. This section explains how to install and configure PHP in an Ubuntu System with Apache2 and MySQL.
This section assumes you have installed and configured Apache2 Web Server and MySQL Database Server. You can refer to the Apache2 and MySQL sections in this document to install and configure Apache2 and MySQL respectively.
Installation
PHP is available in Ubuntu Linux. Unlike Python, which is installed in the base system, PHP must be added.
To install PHP and the Apache PHP module you can enter the following command at a terminal prompt:
sudo apt install php libapache2-mod-phpYou can run PHP scripts at a terminal prompt. To run PHP scripts at a terminal prompt you should install the php-cli package. To install php-cli you can enter the following command:
sudo apt install php-cliYou can also execute PHP scripts without installing the Apache PHP module. To accomplish this, you should install the php-cgi package via this command:
sudo apt install php-cgiTo use MySQL with PHP you should install the php-mysql package, like so:
sudo apt install php-mysqlSimilarly, to use PostgreSQL with PHP you should install the php-pgsql package:
sudo apt install php-pgsqlConfiguration
If you have installed the libapache2-mod-php or 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 Apache 2 Web server is configured to run PHP scripts using this module. Please verify if the files /etc/apache2/mods-enabled/php8.*.conf and /etc/apache2/mods-enabled/php8.*.load exist. If they do not exist, you can enable the module using the a2enmod command.
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.serviceTesting
To verify your installation, you can run the following PHP phpinfo script:
You can save the content in a file sudo apt install php-cli 0 and place it under the sudo apt install php-cli 1 directory of the Apache2 Web server. Pointing your browser to sudo apt install php-cli 2 will display the values of various PHP configuration parameters.
References
For more in depth information see the php.net documentation.
There are a plethora of books on PHP 7 and 8. A good book from O’Reilly is Learning PHP, which includes an exploration of PHP 7’s enhancements to the language.
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