tp框架根据不同的字段进行查询

$map['id|username'] = array(intval($keyword),array('like', '%' . $keyword . '%'),'_multi' => true);
return 

Array
(
    [id|username] => Array
        (
            [0] => 1932000
            [1] => Array
                (
                    [0] => like
                    [1] => %1932000%
                )

            [_multi] => 1
        )

)