fopen() shows PHP/4.0.6

[Anon]

When using fopen(), if I pull in a page within my own domain, I noticed in the log files it shows the connecting browser as PHP/4.0.6

Normally it would show something like, Mozilla/4.0

Is there anyway to change what it shows, so it says the domain name or something to that effect?

I want this to be a global change within my PHP root files if possible.

Thanks in advance