php 连接mongodb
代码如下:
try {
　　$mongo = new Mongo("mongodb://username:password@127.0.0.1:27017/db1");
}catch(MongoConnectionException $e) {
print $e->getMessage();
exit;
}

选择数据库blog
代码如下:
$db = $mongo->blog;

关闭数据库
代码如下:
$conn->close();

选择操作集合
$collection = $db->users;
插入数据
代码如下:
$user = array('name' => 'caleng', 'city' => 'beijing');
$collection->insert($user);

修改数据
代码如下:
$newdata = array('$set' => array("city" => "shanghai"));
$collection->update(array("name" => "caleng"), $newdata);

删除数据
代码如下:
$collection->remove(array('name'=>'caleng'), array("justOne" => true));

查找数据
查找一条数据
代码如下:
$result= $collection->findone(array("name"=>"caleng"));

查询一个列表
代码如下:
//找出创建时间大于某一时间的数据
$start = 1;
$counditionarray=array("ctime"=>array('$gt'=>1337184000));
$list_data = $this->game_handle->find($counditionarray);
$total = $this->game_handle->count($counditionarray);
$list_data->limit($count); //数据结束位置
$list_data->skip($start); //数据开始取的位置
var_dump($list_data);

in查询
代码如下:
$cursor = $collection->find(array(
'name' => array('$in' => array('Joe', 'Wendy'))
));

group查询
代码如下:
$collection->insert(array("category" => "fruit", "name" => "apple"));
$collection->insert(array("category" => "fruit", "name" => "peach"));
$collection->insert(array("category" => "fruit", "name" => "banana"));
$collection->insert(array("category" => "veggie", "name" => "corn"));
$collection->insert(array("category" => "veggie", "name" => "broccoli"));
$keys = array("category" => 1);
$initial = array("items" => array());
$reduce = "function (obj, prev) { prev.items.push(obj.name); }";
$g = $collection->group($keys, $initial, $reduce);
echo json_encode($g['retval']);

输出结果：
代码如下:
[{"category":"fruit","items":["apple","peach","banana"]},{"category":"veggie","items":["corn","broccoli"]}]

可以看出得到的结果是一个二维 数组
代码如下:
array(
0 => array("category" =>"fruit", "items"=>array("apple","peach","banana")),
1 => array("category" =>"veggie", "items"=>array("corn","broccoli"))
)

在这里这写了一些简单的操作，如果您想用php更好的作用mongodb 那就看手册吧。