PHP Mongodb API参考

<?php

/*** Mongodb类** examples:

* $mongo = new HMongodb("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();

*/  

class HMongodb {  

    //Mongodb连接

    var $mongo;  

    var $curr_db_name;

    var $curr_table_name;

    var $error;  

    /**

    * 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

    */

    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 {

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

        }

        catch (MongoConnectionException $e)

        {

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

            return false;

        }

    }  

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

    {

        static $mongodb_arr;

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

        {

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

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

        {

            $mongo = new HMongodb($mongo_server);

            if (emptyempty($mongodb_arr[$flag['tag']]))

            {

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

            }

            return $mongo;

        }

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

        {

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

        }

        else

        {

            $mongo = new HMongodb($mongo_server);

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

            return $mongo;                  }          }  

    /**

    * 连接mongodb server

    *

    * 参数：无

    *

    * 返回值：

    * 成功：true

    * 失败：false

    */

    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

    */

    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

    */

    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

    */

    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

    */

    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

    */

    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

    */

    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

    */

    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 (!emptyempty($result_condition['start']))

        {

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

        }

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

        {

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

        }

        if (!emptyempty($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

    */

    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

    */

    function getError()

    {

        return $this->error;

    }

}  

?>
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