pdo_get 操作

条件
$filter = array(
    'username like' => "%mizhou%",
    'remark !=' => "",
    'starttime >=' => 1502413770,
    'starttime <=' => 1567133479,
    'status' => 1,
);

//生成的SQL等同于：SELECT username FROM ims_users WHERE username like '%mizhou%' AND status = '1' AND remark != '' AND starttime >= '1502413770' AND starttime <= '1567133479' LIMIT 1
$user = pdo_get('users', $filter, array('username'));