About Laravel Transactions

        DB::beginTransaction();        foreach($checkArr[0] as $v){            $id = explode('-',$v)[0];            $rank = explode('-',$v)[1] != '' ? explode('-',$v)[1] : 5;            if(index_friendlink::where('id','=',$id)->pluck('online') == 1){                $updrank = index_friendlink::find($id);                $updrank -> rank = $rank;                $updrank -> save();            }        }        $ret = index_friendlink::where('online','=','1')->get();        foreach($ret as $v) {            $retRank[] = $v->rank;        }        if (count($retRank) != count(array_unique($retRank))) {            DB::rollback();            echo '2';            exit;        }        DB::commit();                        怎么回滚不了，第一次使用laravel，求大神解答，数据库已改成innodb

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        DB::beginTransaction();        foreach($checkArr[0] as $v){            $id = explode('-',$v)[0];            $rank = explode('-',$v)[1] != '' ? explode('-',$v)[1] : 5;            if(index_friendlink::where('id','=',$id)->pluck('online') == 1){                $updrank = index_friendlink::find($id);                $updrank -> rank = $rank;                $updrank -> save();            }        }        $ret = index_friendlink::where('online','=','1')->get();        foreach($ret as $v) {            $retRank[] = $v->rank;        }        if (count($retRank) != count(array_unique($retRank))) {            DB::rollback();            echo '2';            exit;        }        DB::commit();                        怎么回滚不了，第一次使用laravel，求大神解答，数据库已改成innodb

Your rollback condition is to use PHP to judge, and the transaction should be separated from PHP, MySQL can be directly implemented, such as delete or insert failed or did not go to commit rollback. Check this out.

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