LAMP (Linux, Apache, MySQL and PHP) is an open source Web development platform that uses Linux as operating system, Apache as the Web server, MySQL as the relational database management system and PHP as the object-oriented scripting language.

Open terminal and Type the command :install it   first  with

sudo apt-get install tasksel

Now to install LAMP, type the taskel command in terminal :

sudo  tasksel

And select LAMP Server:

During the installation  you  will be  asked  to insert the  mysql root  password

Now check if php is working :

$sudo vi /var/www/info.php

and add

<?php
phpinfo();
?>

save and exit

restart apache2 ,

#sudo /etc/init.d/apache2 restart

Now open browser and type :

http://ip/info.php or http://localhost/info.php

Php is installed.

To full manage  your  lamp Server database, install  phpmyadmin

sudo  apt-get  install  phpmyadmin

To login  to phpmyadmin, open browser and type :

http://ip/phpmyadmin   or http://localhost/phpmyadmin

re-blogged from: unixmen.com