Raises an error. In >= PHP5, this will throw an exception. In PHP4, this will trigger a user error.

• link: http://www.php.net/manual/en/ref.errorfunc.php#errorfunc.constants
• todo: support PHP5 exceptions without causing a syntax error. Probably should use factory pattern and instantiate a different class depending on PHP version

• string $msg
• integer $type: One of the PHP Error Constants (E_USER_ERROR, E_USER_WARNING, E_USER_NOTICE)

Constructor