php获取本季开始结束时间

                $jijie = [
                    strtotime(date('Y-01-01')),
                    strtotime(date('Y-04-01')),
                    strtotime(date('Y-07-01')),
                    strtotime(date('Y-10-01')),
                ];
    
                for($i=0;$i<4;$i++){
                    if(time() > $jijie[$i]){
                        $start = date('Y-m-d H:i:s',$jijie[$i]);
                        $end = date('Y-m-d H:i:s',strtotime($start.' +3 month') -1);
                    }
                }