How to specify a string value in setFilter?

Question

Sphinx

According to the API, SetFilter - for some reason unknown to me, accepts only numbers as values.
Accordingly, then what is the correct way to execute the request?

$sphinx->SetFilter('gender', array('male'));
$sphinx->Query('человек', '*');

Answer 1

Understood. Who cares:
in the sphinx config we write something like:

SELECT id, CRC32(user_type) AS user_type \
        FROM users
sql_attr_uint    = user_type

and in code

$this->sphinxClient->SetFilter('user_type', array(crc32('admin'));