How to deploy a PHP Application on a LAN?

When you install Apache or IIS or any other web server application, your computer acts as a web server. a webserver is not limited to local environment but it can respond to the request recieved from the internet too.

for example if you have installed Apache or IIS in your computer and you are connected to internet. then note down your IP address and switch to any other computer from outside and try accessing your computer and voila it accesses your files from within the web root directory as defined by your web server. your PC is now acting as a web server for the client. the same goes with LAN.

take for example there are 5 PC's connected to a WIFI router. the wifi will assign the local IP address to all the computer and hence

PC 1 have IP Address 192.168.1.2

PC 2 have IP Address 192.168.1.3

PC 3 have IP Address 192.168.1.4

PC 4 have IP Address 192.168.1.5

PC 5 have IP Address 192.168.1.6

now take for example you have installed Apache or IIS in PC 1 which have an IP address of 192.168.1.2, now all the other computer connected to netowrk will be able to access your web directory from the address 192.168.1.2. via a web browser. this will work regardless of what PHP application you are using. it is your Web server which is responsible for routing incoming request not your PHP application :)

hope this helps.

Should i use EasyPHP to install the application on my client's LAN server?

Yes. And those on the network would access the site just like you do from the local machine, except that they'll replace localhost with that machine's IP address.