1、forecah里要给对象新增字段。as后的变量要加&。例如：

foreach($list as &$group){    //新增字段    $group['aaaa'] = "add field";}

2、redis zrange获取，mysql select用到in的时候

$idlist = $this->redis->zRange('test:zlist', 0, -1, false);$inStr = implode(',',$idlist);$sql = "select * from test where id in ($inStr)";