Here’s how to change the port setting on the Apache from the XAMPP:

1. Open httpd.conf at ..\xampp\apache\conf\
2. Change ‘Listen 80′ to e.g ‘Listen 8080′
3. And ‘Servername localhost:80′ to e.g ‘Servername localhost:8080′ then save
4. Open httpd-ssl.conf at ..\xampp\apache\conf\extra\
5. Change ‘Listen 443′ to e.g ‘Listen 4499′
6. And ‘<VirtualHost_default_:443>’ to e.g ‘<VirtualHost_default_:4499>’
7. And ‘ServerName localhost:443′ to e.g ‘ServerName localhost:4499′

Then run the XAMPP Control Panel on the C: \ xampp \ xampp-control.exe
Click Start on Apache then in the box details below appears warning “Apache started [Port 80]“. Then open the browser and when the address http://localhost:8080/xampp. If successful, the Apache Web Service has been running on port 8080.

But something happen here, my basic application using PHP are worked but CodeIgniter and Wordpress are not working #:-s.
Even I made changed on my base url like this $config['base_url']= “http://localhost:8080/bcode/” anyone help me?.

So finally I reconfiguration my settings. I changed back to ‘Listen 80′ from ‘Listen 8080′ at ..\xampp\apache\conf\. Then made a new port for my IIS like this Open Control Panel-> Administrative Tools-> Internet Information Service-> Click Default Web Site and change to 8080, and it’s works.

See also how to install phpmyadmin on IIS.