object &PEAR_Config::singleton ([string $user_file = '' [, string $system_file = '']])
object &PEAR_Config::singleton
If you want to keep only one instance of this class in use, this method will give you a reference to the last created PEAR_Config object if one exists, or create a new object.
file to read user-defined options from
file to read system-wide defaults from
object - an existing or new PEAR_Config instance
PEAR_Config::PEAR_Config()
This function should be called statically.
