(PECL gender >= 0.9.0) Check if the name0 is an alias of the name1.
(PECL gender >= 0.6.0) Construct the Gender object.
(PECL gender >= 0.6.0) Connect to an external name dictionary.
(PECL gender >= 0.6.0) Get gender of a name.
(PECL gender >= 0.8.0) Get textual country representation
(PECL gender >= 0.9.0) Get similar names.