php对mongodb的扩展(小试牛刀)

今天外面刮着呼呼的大风，能在一个温暖的小屋写着博客也是北漂的一种幸福。好了废话不多说，今天主要说一下php连接、操作mongodb，如果你没有看上两期的内容，不知道如何安装php对mongodb的扩展的话请您返回去看《http://www.jb51.net/article/31866.htm" target=_blank>php对mongodb的扩展(初识如故) 》和《php对mongodb的扩展(初出茅庐)》 。

php 连接mongodb

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

$db = $mongo->blog;

关闭数据库

$conn->close();

选择操作集合
$collection = $db->users;
插入数据

$user = array('name' => 'caleng', 'city' => 'beijing'); 
$collection->insert($user);

修改数据

$newdata = array('$set' => array("city" => "shanghai")); 
$collection->update(array("name" => "caleng"), $newdata);

删除数据

$collection->remove(array('name'=>'caleng'), array("justOne" => true));

查找数据
查找一条数据

$result= $collection->findone(array("name"=>"caleng"));

查询一个列表

//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

$cursor = $collection->find(array( 
'name' => array('$in' => array('Joe', 'Wendy')) 
));

group查询

$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：

[{"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

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。