摘要：數據庫連接默認格式這里采用默認連接本機的端口，當然也可以連接遠程主機如如果端口是，端口可以省略。針對游標對象的操作類或者或者我的博客文章

$m = new Mongo();
//這里采用默認連接本機的27017端口，當然也可以連接遠程主機如  192.168.0.4:27017,如果端口是27017，端口可以省略。

$m = new Mongo("mongodb://${username}:${password}@localhost");

實例：

$m = new Mongo("mongodb://127.0.0.1:27017/admin:admin");

數據庫的用戶名和密碼都是admin

selectDB("comedy");
$db = $m->comedy;
//選擇comedy里面的collection集合，相當于RDBMS里面的表，也可以使用
$collection = $db->collection;
$db->selectCollection("collection");
/*********添加一個元素**************/
$obj = array("title" => "php1", "author" => "Bill Watterson");
//將$obj 添加到$collection 集合中
$collection->insert($obj);
/*********添加另一個元素**************/
$obj = array("title" => "huaibei", "online" => true);
$collection->insert($obj);
//$query = array("title" => "huaibei");
$query = array( "_id" => $obj["_id"] );
$cursor = $collection->find($query);
//遍歷所有集合中的文檔
foreach ($cursor as $obj) {
   echo $obj["title"] . "
";
   echo $obj["_id"] . "
";
}
//斷開MongoDB連接
$m->close();

mysql: id = 123
mongo: array(‘id’=>123)
mysql: name link ’%bar%’
mongo: array(‘name’ => new MongoRegex(‘/.*bar.*/i’))
mysql: where id > 10
mongo: array(‘id’ => array(‘$gt’ => 10))
mysql: where id >= 10
mongo: array(‘id’ => array(‘$gte’ => 10))
mysql: where id < 10
mongo: array(‘id’ => array(‘$lt’ => 10))
mysql: where id <= 10
mongo: array(‘id’ => array(‘$lte’ => 10))
mysql: where id > 1 and id < 10
mongo: array(‘id’ => array(‘$gt’ => 1,’$lt’ => 10))
mysql: where id <> 10
mongo: array(‘id’ => array(‘$ne’ => 10))
mysql: where id in(123)
mongo: array(‘id’ => array(‘$in’ => array(1,2,3)))
mysql: where id not in(123)
mongo: array(‘id’ => array(‘$nin’ => array(1,2,3)))
mysql: where id = 2 or id = 9
mongo: array(‘id’ => array(‘$or’ => array(array(‘id’=>2),array(‘id’=>9))))
mysql: order by name asc
mongo: array(‘sort’=>array(‘name’=>1))
mysql: order by name desc
mongo: array(‘sort’=>array(‘name’=>-1))
mysql: limit 0,2
mongo: array(‘limit’=>array(‘offset’=>0,’rows’=>2))
mysql: select name,email
mongo: array(‘name’,"email’)
mysql: select count(name)
mongo: array(‘COUNT’) //注意：COUNT為大寫

查詢時，每個Object插入時都會自動生成一個獨特的_id,它相當于RDBMS中的主鍵，用于查詢時非常方便 （_id每一都不同，很像自動增加的id）

 "joe");
$collection->insert($param);
$joe = $collection->findOne(array("_id" => $param["_id"]));
print_R($joe);
$m->close();

返回結果：Array ( [_id] => MongoId Object ( [$id] => 4fd30e21870da83416000002 ) [name] => joe )

 "php1");
$param = array("title" => "php1","author"=>"test");
$joe = $collection->update($sign, $param);

$m -> dropDB(“comedy”);

$m->listDBs();   //無返回值

刪除當前DB
dbname;
$db->drop();
獲得當前數據庫名
dbname;
$db->_tostring();
選擇想要的collection:
//A:
$mo = new Mongo();
$coll = $mo->dbname->collname;//獲得一個collection對象
//B：
$db = $mo->selectDB(’dbname’);
$coll = $db->collname;
//C:
$db = $mo->dbname;
$coll = $db->collname;
//D:
$db = $mo->dbname;
$coll = $db->selectCollectoin(’collname’);//獲得一個collection對象
插入數據（MongoCollection對象
$coll = $mo->db->foo;
$a = array(’a’=>’b’);
$options = array(’safe’=>true);
$rs  =$coll->insert($a,$options);
刪除數據庫中的記錄（MongoCollection對象）
$coll = $mo->db->coll;
$c = array(’a’=>1,’s’=>array(’$lt’=>100));
$options = array(’safe’=>true);
$rs = $coll->remove($c,$options);
更新數據庫中的記錄（MongoCollection對象）
$coll = $mo->db->coll;
$c = array(’a’=>1,’s’=>array(’$lt’=>100));
$newobj = array(’e’=>’f’,’x’=>’y’);
$options = array(’safe’=>true,’multiple’=>true);
$rs = $coll->remove($c,$newobj,$options);
查詢collection獲得單條記錄（MongoCollection類）
$coll = $mo->db->coll;
$query = array(’s’=>array(’$lt’=>100));
$fields = array(’a’=>true,’b’=>true);
$rs = $coll->findOne($query,$fields);
查詢collection獲得多條記錄（MongoCollection類）
$coll = $mo->db->coll;
$query = array(’s’=>array(’$lt’=>100));
$fields = array(’a’=>true,’b’=>true);
$cursor = $coll->find($query,$fields);
//排序
$cursor->sort(array(‘字段’=>-1));(-1倒序，1正序)
//跳過部分記錄
$cursor->skip(100);跳過100行
//只顯示部分記錄
$cursor->limit(100);只顯示100行
返回一個游標記錄對象MongoCursor。
針對游標對象MongoCursor的操作(MongoCursor類)
$cursor = $coll->find($query,$fields);
while($cursor->hasNext()){
$r = $cursor->getNext();
var_dump($r);
}
//或者
$cursor = $coll->find($query,$fields);
foreache($cursor as $k=>$v){
var_dump($v);
}
//或者
$cursor = $coll->find($query,$fields);
$array= iterator_to_array($cursor);
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