php操作MongoDB基础教程（连接、新增、修改、删除、查询）

代码如下:
//连接localhost:27017
$conn = new Mongo();

//连接远程主机默认端口
$conn = new Mongo('test.com');

//连接远程主机22011端口
$conn = new Mongo('test.com:22011');

//MongoDB有用户名密码
$conn = new Mongo("mongodb://${username}:${password}@localhost")

//MongoDB有用户名密码并指定数据库blog
$conn = new Mongo("mongodb://${username}:${password}@localhost/blog");

//多个服务器
$conn = new Mongo("mongodb://localhost:27017,localhost:27018");
//选择数据库blog
$db = $conn->blog;
//制定结果集（表名：users）
$collection = $db->users;
//新增
$user = array('name' => 'caleng', 'email' => 'admin#admin.com');
$collection->insert($user);
//修改
$newdata = array('$set' => array("email" => "test@test.com"));
$collection->update(array("name" => "caleng"), $newdata);
//删除
$collection->remove(array('name'=>'caleng'), array("justOne" => true));
//查找
$cursor = $collection->find();
var_dump($cursor);
//查找一条
$user = $collection->findOne(array('name' => 'caleng'), array('email'));
var_dump($user);
//关闭数据库
$conn->close();