Change the Install Directory for a php application port

[ptitoliv]

Hello Everybody,

I am writing here because I have a problem finding an information about
installing a port. I would want to install a php application using ports
system but I would like that this application would be installed in a
particular directory on my system. So I am looking for the command line
parameters that allow me to make the installation in another directory.

Thank you for your answers

Best regards,
Ptitoliv