Problem in opening php file on internet explorer

As you mentioned that you have Skype installed which uses port 80 by default, and apache server also uses port 80 by default hence you need to change the port no for any of these two application.

You can configure Skype to use another port by doing the following:

In Skype go to Tools-->Connection options-->uncheck the option --> Use port 80 and 443 as alternatives for incoming connections.

After that restart Skype and Restart all services on WAMP, and then the page in your browser.

If you don't want to configure the skype then you can change the port no. of apache as well like this:

Edit http.conf file in notepad usually located in C:\wamp\Apache2\conf .
then do either CTL+F or go to EDIT/FIND from the notepad menubar. this will open FIND window. type 80 in the 'Find What' box and click find next. replace 80 to whichever port(suppose i gave it 81) to want apache to listen to.

NOw restart all services of wamp. and browser address type localhost:81/filename.php

hope it helps :)

for further queries comment here!