This is the name of the directory where compiled templates are
located. By default this is
, meaning that it
will look for the compile directory in the same directory as
the executing php script. This directory must
be writeable by the web server
This setting must be either a relative or
absolute path. include_path is not used for writing files.
It is not recommended to put this directory under
the web server document root.
See also $compile_id