P4HOST
Name of host computer to impersonate.
Usage notes
| Used by Client? | Used by Server? | Command-Line Alternative | Can be set in P4CONFIG file? | 
|---|---|---|---|
| Yes | No | 
 | Yes | 
Value if not explicitly set
| Operating System | Value | 
|---|---|
| All | The value of the client hostname as returned by  | 
Examples
workstation123.perforce.com
                                            
Notes
P4 Server
			users can use the Host field of the p4 client form to specify
			that a particular client workspace can be used only from a particular
			host machine. When this field has been set, the P4HOST variable can be used to fool
			the service into thinking that the user is on the specified host machine
			regardless of the machine being used by the user. As this is a very
		esoteric need, there’s usually no reason to set this variable.
The hostname must be provided exactly as it appears in the output of
			p4 info when run from that
		host.