Installation
Use apt to install PHP. In addition, include some helper packages this time so that PHP code can run under the Apache server and talk to your MySQL database:
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sudo apt install php libapache2-mod-php php-mysql
Install PHP Command Line Interface:
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sudo apt install php-cli
Configuration
Open the dir.conf file to prioritize PHP extensions over standard ones:
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sudo vim /etc/apache2/mods-available/dir.conf
It should look like this:
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<IfModule mod_dir.c>
DirectoryIndex index.php index.html index.cgi index.pl index.xhtml index.htm
</IfModule>
Lets restart Apache to apply the changes and also check the status of Apache service:
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sudo systemctl restart apache2 && sudo systemctl status apache2
● apache2.service - LSB: Apache2 web server
Loaded: loaded (/etc/init.d/apache2; bad; vendor preset: enabled)
Drop-In: /lib/systemd/system/apache2.service.d
└─apache2-systemd.conf
Active: active (running) since Tue 2018-04-23 14:28:43 EDT; 45s ago
Docs: man:systemd-sysv-generator(8)
Process: 13581 ExecStop=/etc/init.d/apache2 stop (code=exited, status=0/SUCCESS)
Process: 13605 ExecStart=/etc/init.d/apache2 start (code=exited, status=0/SUCCESS)
Tasks: 6 (limit: 512)
CGroup: /system.slice/apache2.service
├─13623 /usr/sbin/apache2 -k start
├─13626 /usr/sbin/apache2 -k start
├─13627 /usr/sbin/apache2 -k start
├─13628 /usr/sbin/apache2 -k start
├─13629 /usr/sbin/apache2 -k start
└─13630 /usr/sbin/apache2 -k start
Verification
Now let’s check if everything is working correctly by creating a PHP file under the web hosting directory we created earlier on the Apache Installation section:
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sudo vim /var/www/your_domain/phpinfo.php
Add the following lines to the phpinfo.php:
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<?php
phpinfo();
?>
Now we can check the ouput via the browser by going to your domain/ip:
http://your_domain/phpinfo.php or http://your_ip/phpinfo.ph If it successful go ahead and remove the file to avoid giving away security information:
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sudo rm /var/www/your_domain/phpinfo.php