I have prepared the following shell script to make LAMP installation fully automated.

installation.sh

#!/bin/bash

if [ "`lsb_release -is`" == "Ubuntu" ] || [ "`lsb_release -is`" == "Debian" ]
then
    sudo apt-get -y install mysql-server mysql-client mysql-workbench libmysqld-dev;
    sudo apt-get -y install apache2 php5 libapache2-mod-php5 php5-mcrypt phpmyadmin;
    sudo chmod 777 -R /var/www/;
    sudo printf "<?php\nphpinfo();\n?>" > /var/www/html/info.php;
    sudo service apache2 restart;
  else
    echo "Unsupported Operating System";
fi