[PHP] getting ip of server

[Tom Cruickshank]

Hello,
I'm curious to know if there is a php command that can get the IP of the 
server it's running on. I could always do this...

$results = exec("/sbin/ifconfig <ethernet device> | grep broadcast | awk 
'{print $2}'", $value);

but I would prefer to not have to use system commands for this.

Would anyone happen to know?

Tom