please can someone tell me how different is php applications running on a company's intranet from hosted php applications or websites in otherwords. any help is greatly appreciated in advance.

Nothing at all!

Other than how sendmail might be configured or work I agree that that what you see is what you get; both intra and inter.

A server running PHP is a server running PHP.

thank you very much for your replies. however how do you make it accessible to other network users through their web browsers? that is by just allowing them to type the address of the application in the address bar of their browsers to access the application which is kept on other computer on the network. any effort to reply is greatly appreciated in advance.

Exactly the same way you do on the Internet. Use DNS or the IP of the machine it runs on

No i don't think so there are any major changes on the application and its usage which can be generated through intranet or internet

ok asbharmal what are some of the changes you think need to be made. it will do as more good if you can list them or suggest some reading materials on them. thanks to everyone for the replies so far.