Php5

PHP5 (PHP: Hypertext Preprocessor) is a server-side programming language. It can also be used for general programming, though.

Installation

Debian / Ubuntu

Install PHP5 to Apache:

 aptitude install php5

Install PHP5 Nginx:

  apt-get install php5-fpm

Red Hat / CentOS / Fedora

Install PHP CentOS

yum install php

Restart apache2

 /etc/init.d/httpd restart

More instructions for CentOS https://www.digitalocean.com/community/tutorials/how-to-install-linux-apache-mysql-php-lamp-stack-on-centos-6

Configuration

PHP5 configuration file is under the path (Apache):

 /etc/php5/php.ini

PHP5 configuration file is under the path (Nginx):

  nano /etc/php5/fpm/php.ini

You can test the functionality of fphp5 by creating the /var/www/index.php file and putting the following snippet of code in it:

 <?php
 echo "PHP5 works"
 ?>

After this connect to the server and go to the address server_ip-address/index.php (for example, 10.10.10.10/index.php). If you see the text "PHP5 works" then everything works as they're meant to.

More information on PHP programming php.net and tutorials w3schools.com