Installed php, how did php4 files get on?

[jeepsforme]

I downloaded and installed 3.0.1 full version, php files, in zip compression. It installed just fine and works well. All the files had the php extension, there were no other extensions. A couple days later, I noticed that for almost every file with a php extension, there also existed a file of the same name except it's extension was php4. Double the files. What created the php4 files? Did someone try to run something with a php4 extension and tada, here they are?

Can I simply delete the php4 files leaving the php files alone?

Confused in PA!

[Zachery]

This would be somthing to do with your hosts setup, They might have changed somthing on the server. there is nothing in vBulletin that would do this.