MongoDB CURD练习

//$manager = new MongoDB\Driver\Manager("mongodb://root:Cankao2016@127.0.0.1:27017");  
        //$bulk = new MongoDB\Driver\BulkWrite;

        // 插入数据
        // $bulk->insert(['title' => '军事新闻', 'author'=>'mier', 'url' => 'http://www.runoob.com']);
        // $manager->executeBulkWrite('runoob.runoob', $bulk);
        //$where  = ['x' => ['$lt'=>20],'name'=>'taobao']; 

       //查询操作
        //$where = [];
        //$where =  ['x'=>['$gt'=>2]];
       /* $options = [
            'projection' => ['_id' => 0],
            'sort' => ['x' => -1],
        ];*/
        //$options = ['name' =>'taobao'];

        // $query = new MongoDB\Driver\Query($where);
        // $data  = $manager->executeQuery('runoob.runoob',$query);
         // print_r($data->toArray());
  //       foreach ($data as $document) {
  //        print_r($document);
  //        //echo "<p>".$document->_id."</p>";
  //        //print_r(json_decode(json_encode($document),true));
        //  }     

        /*  $rp = new MongoDB\Driver\ReadPreference(MongoDB\Driver\ReadPreference::RP_PRIMARY);
            var_dump($rp->bsonSerialize());

            echo "\n", MongoDB\BSON\toJSON(MongoDB\BSON\fromPHP($rp));
        */


        /*$wc = new MongoDB\Driver\WriteConcern(MongoDB\Driver\WriteConcern::MAJORITY);
        print_r($);
        print_r($wc->bsonSerialize());
        echo "\n", MongoDB\BSON\toJSON(MongoDB\BSON\fromPHP($wc));die;*/

        //$wc = new MongoDB\Driver\WriteConcern(1);
        //var_dump($wc->bsonSerialize());

    /*  $wc = new MongoDB\Driver\WriteConcern(1, 0, true);
        var_dump($wc->getJournal());

        $wc = new MongoDB\Driver\WriteConcern(1, 0, false);
        var_dump($wc->getJournal());*/



    //更新操作
        /*$bulk = new MongoDB\Driver\BulkWrite;
        $bulk->update(['name'=>'菜鸟教程'],['$set' =>['name'=>rand(10,10000).'abc']]);       
        $writeConcern = new MongoDB\Driver\WriteConcern(MongoDB\Driver\WriteConcern::MAJORITY, 1000);
        $result = $manager->executeBulkWrite('runoob.runoob', $bulk, $writeConcern);*/


    //删除操作
        //  $bulk = new MongoDB\Driver\BulkWrite;
        //  $bulk->delete(['name' => 'taobao'], ['limit' => 1]);   // limit 为 1 时，删除第一条匹配数据
        // // //$bulk->delete(['x' => 2], ['limit' => 0]);   // limit 为 0 时，删除所有匹配数据
        // $writeConcern = new MongoDB\Driver\WriteConcern(MongoDB\Driver\WriteConcern::MAJORITY, 1000);
        // $result = $manager->executeBulkWrite('runoob.runoob', $bulk, $writeConcern);
        // var_dump($result);