I've strange problem. For any project we're using following cloud hosting.

http://world wide web.rackspace.com

I've installed wordpress on four sub-domain names about this server.

Now i'm facing an unusual problem. Sometimes after i make alterations in theme flies, browser doesn't reflect individuals changes.

As with abc.php file i've incorporated abc.php file. I made some changes to abc.php however when i open that page in browser, i am unable to see changes. The problem is much more worst, because even i attempted to remove/relabel abc.php however i can continue to see previous include on abc.php page.

It had been happening before, but after a while behavior was normal. Now it has been 2 days and i'm facing this issue. I've contact hosting supprt, but they don't accept any problem. They are saying there's some problem inside your wordpress. I am certain which i have no cache wordpress plugin in wordpress. Are you able to assist me to how you can resolve this problem?

Usually Content management systems implement some cache mechanism. I suppose your condition originates from that. Check for those who have some "flush cache" option within the admin sections.