PHP实现的MongoDB数据库操作类分享

<div class="jb51code">
<pre class="brush:php;">
class HMongodb {

private $mongo; //Mongodb连接
private $curr_db_name;
private $curr_table_name;
private $error;

public function getInstance($mongo_server,$flag=array())
{
static $mongodb_arr;
if (empty($flag['tag']))
{
$flag['tag'] = 'default'; }
if (isset($flag['force']) && $flag['force'] == true)
{
$mongo = new HMongodb($mongo_server);
if (empty($mongodb_arr[$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;
}
}

/**

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
$auto_balance:是否自动做负载均衡，默认是
返回值：
成功：mongo object
失败：false
*/
private function __construct($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;
}
}

/**

连接mongodb 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,$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,$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,$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;
}

/* 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,"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","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();
*/

}

PHP实现的MongoDB数据库操作类分享

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