LAMP (Linux - Apache - MySQL - PHP) is a common webserver software stack for Linux. Installing the basic components is simple, just access your server via SSH and run the following commands:
# yum install httpd
# yum install php
# yum install mysql-server mysql
# service httpd start
# service mysqld start
To check if the setup was successful, access http://xx.xx.xx.xx (your server's IP address) in a browser. You should see a default Apache page. You can test PHP by creating a file in /var/www/html:
# vi /var/www/html/test.php
And adding the following content:
<?php phpinfo(); ?>
Access http://xx.xx.xx.xx/test.php in your browser. If you see information about your PHP installation displayed without any errors, you're done!