mongodb php 操作类 带几个简单的例子

class NewMongodb {

private $mongo; //NewMongodb连接

private $curr_db_name;

private $curr_table_name;

private $error;

public $config;

public function getInstance($mongo_server, $flag=array())

{

static $NewMongodb_arr;

if (empty($flag['tag']))

{

$flag['tag'] = 'default'; }

if (isset($flag['force']) && $flag['force'] == true)

{

$mongo = new NewMongodb($mongo_server);

if (empty($NewMongodb_arr[$flag['tag']]))

{

$NewMongodb_arr[$flag['tag']] = $mongo;

}

return $mongo;

}

else if (isset($NewMongodb_arr[$flag['tag']]) && is_resource($NewMongodb_arr[$flag['tag']]))

{

return $NewMongodb_arr[$flag['tag']];

}

else

{

$mongo = new NewMongodb($mongo_server);

$NewMongodb_arr[$flag['tag']] = $mongo;

return $mongo;

}

}

/**

* 构造函数

* 支持传入多个mongo_server(1.一个出问题时连接其它的server 2.自动将查询均匀分发到不同server)

*

* 参数：

* $mongo_server:数组或字符串-array("127.0.0.1:1111", "127.0.0.1:2222")-"127.0.0.1:1111"

* $connect:初始化mongo对象时是否连接，默认连接

* $auto_balance:是否自动做负载均衡，默认是

*

* 返回值：

* 成功：mongo object

* 失败：false

*/

public function __construct($mongo_server, $connect=true, $auto_balance=true)

{

if (is_array($mongo_server))

{

$mongo_server_num = count($mongo_server);

if ($mongo_server_num > 1 && $auto_balance)

{

$prior_server_num = rand(1, $mongo_server_num);

$rand_keys = array_rand($mongo_server,$mongo_server_num);

$mongo_server_str = $mongo_server[$prior_server_num-1];

foreach ($rand_keys as $key)

{

if ($key != $prior_server_num - 1)

{

$mongo_server_str .= ',' . $mongo_server[$key];

}

}

}

else

{

$mongo_server_str = implode(',', $mongo_server);

} }

else

{

$mongo_server_str = $mongo_server;

}

try {

$this->mongo = new MongoClient($mongo_server, array('connect'=>$connect));

}

catch (MongoConnectionException $e)

{

$this->error = $e->getMessage();

return false;

}

}

/**

* 连接NewMongodb server

*

* 参数：无

*

* 返回值：

* 成功：true

* 失败：false

*/

public function connect()

{

try {

$this->mongo->connect();

return true;

}

catch (MongoConnectionException $e)

{

$this->error = $e->getMessage();

return false;

}

}

/**

* select db

*

* 参数：$dbname

*

* 返回值：无

*/

public function selectDb($dbname)

{

$this->curr_db_name = $dbname;

}

/**

* 创建索引：如索引已存在，则返回。

*

* 参数：

* $table_name:表名

* $index:索引-array("id"=>1)-在id字段建立升序索引

* $index_param:其它条件-是否唯一索引等

*

* 返回值：

* 成功：true

* 失败：false

*/

public function ensureIndex($table_name, $index, $index_param=array())

{

$dbname = $this->curr_db_name;

$index_param['safe'] = 1;

try {

$this->mongo->$dbname->$table_name->ensureIndex($index, $index_param);

return true;

}

catch (MongoCursorException $e)

{

$this->error = $e->getMessage();

return false;

}

}

/**

* 插入记录

*

* 参数：

* $table_name:表名

* $record:记录

*

* 返回值：

* 成功：true

* 失败：false

*/

public function insert($table_name, $record)

{

$dbname = $this->curr_db_name;

try {

$this->mongo->$dbname->$table_name->insert($record, array('safe'=>true));

return true;

}

catch (MongoCursorException $e)

{

$this->error = $e->getMessage();

return false;

}

}

/**

* 查询表的记录数

*

* 参数：

* $table_name:表名

*

* 返回值：表的记录数

*/

public function count($table_name)

{

$dbname = $this->curr_db_name;

return $this->mongo->$dbname->$table_name->count();

}

/**

* 更新记录

*

* 参数：

* $table_name:表名

* $condition:更新条件

* $newdata:新的数据记录

* $options:更新选择-upsert/multiple

*

* 返回值：

* 成功：true

* 失败：false

*/

public function update($table_name, $condition, $newdata, $options=array())

{

$dbname = $this->curr_db_name;

$options['safe'] = 1;

if (!isset($options['multiple']))

{

$options['multiple'] = 0; }

try {

$this->mongo->$dbname->$table_name->update($condition, $newdata, $options);

return true;

}

catch (MongoCursorException $e)

{

$this->error = $e->getMessage();

return false;

}

}

/**

* 删除记录

*

* 参数：

* $table_name:表名

* $condition:删除条件

* $options:删除选择-justOne

*

* 返回值：

* 成功：true

* 失败：false

*/

public function remove($table_name, $condition, $options=array())

{

$dbname = $this->curr_db_name;

$options['safe'] = 1;

try {

$this->mongo->$dbname->$table_name->remove($condition, $options);

return true;

}

catch (MongoCursorException $e)

{

$this->error = $e->getMessage();

return false;

} }

/**

* 查找记录

*

* 参数：

* $table_name:表名

* $query_condition:字段查找条件

* $result_condition:查询结果限制条件-limit/sort等

* $fields:获取字段

*

* 返回值：

* 成功：记录集

* 失败：false

*/

public function find($table_name, $query_condition, $result_condition=array(), $fields=array())

{

$dbname = $this->curr_db_name;

$cursor = $this->mongo->$dbname->$table_name->find($query_condition, $fields);

if (!empty($result_condition['start']))

{

$cursor->skip($result_condition['start']);

}

if (!empty($result_condition['limit']))

{

$cursor->limit($result_condition['limit']);

}

if (!empty($result_condition['sort']))

{

$cursor->sort($result_condition['sort']);

}

$result = array();

try {

while ($cursor->hasNext())

{

$result[] = $cursor->getNext();

}

}

catch (MongoConnectionException $e)

{

$this->error = $e->getMessage();

return false;

}

catch (MongoCursorTimeoutException $e)

{

$this->error = $e->getMessage();

return false;

}

return $result;

}

/**

* 查找一条记录

*

* 参数：

* $table_name:表名

* $condition:查找条件

* $fields:获取字段

*

* 返回值：

* 成功：一条记录

* 失败：false

*/

public function findOne($table_name, $condition, $fields=array())

{

$dbname = $this->curr_db_name;

return $this->mongo->$dbname->$table_name->findOne($condition, $fields);

}

/**

* 获取当前错误信息

*

* 参数：无

*

* 返回值：当前错误信息

*/

public function getError()

{

return $this->error;

}

/*** NewMongodb类** examples:

* $mongo = new NewMongodb("127.0.0.1:11223");

* $mongo->selectDb("test_db");

* 创建索引

* $mongo->ensureIndex("test_table", array("id"=>1), array('unique'=>true));

* 获取表的记录

* $mongo->count("test_table");

* 插入记录

* $mongo->insert("test_table", array("id"=>2, "title"=>"asdqw"));

* 更新记录

* $mongo->update("test_table", array("id"=>1),array("id"=>1,"title"=>"bbb"));

* 更新记录-存在时更新，不存在时添加-相当于set

* $mongo->update("test_table", array("id"=>1),array("id"=>1,"title"=>"bbb"),array("upsert"=>1));

* 查找记录

* $mongo->find("c", array("title"=>"asdqw"), array("start"=>2,"limit"=>2,"sort"=>array("id"=>1)))

* 查找一条记录

* $mongo->findOne("$mongo->findOne("ttt", array("id"=>1))", array("id"=>1));

* 删除记录

* $mongo->remove("ttt", array("title"=>"bbb"));

* 仅删除一条记录

* $mongo->remove("ttt", array("title"=>"bbb"), array("justOne"=>1));

* 获取Mongo操作的错误信息

* $mongo->getError();

*/

}