之前已經發過幾篇類似的文章，大家可以參考一下。
核心代碼：
class NewMongodb {
private $mongo; //NewMongodb連接
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;
}
}
/**
* 構造函數
* 支持傳入多個mongo_server(1.一個出問題時連接其它的server 2.自動將查詢均勻分發到不同server)
*
* 參數：
* $mongo_server:數組或字符串-array("127.0.0.1:1111", "127.0.0.1:2222")-"127.0.0.1:1111"
* $connect:初始化mongo對象時是否連接，默認連接
* $auto_balance:是否自動做負載均衡，默認是
*
* 返回值：
* 成功：mongo object
* 失敗：false
*/
public function __construct($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;
}
}
/**
* 連接NewMongodb server
*
* 參數：無
*
* 返回值：
* 成功：true
* 失敗：false
*/
public function connect()
{
try {
$this->mongo->connect();
return true;
}
catch (MongoConnectionException $e)
{
$this->error = $e->getMessage();
return false;
}
}
/**
* select db
*
* 參數：$dbname
*
* 返回值：無
*/
public function selectDb($dbname)
{
$this->curr_db_name = $dbname;
}
/**
* 創建索引：如索引已存在，則返回。
*
* 參數：
* $table_name:表名
* $index:索引-array("id"=>1)-在id字段建立升序索引
* $index_param:其它條件-是否唯一索引等
*
* 返回值：
* 成功：true
* 失敗：false
*/
public function ensureIndex($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;
}
}
/**
* 插入記錄
*
* 參數：
* $table_name:表名
* $record:記錄
*
* 返回值：
* 成功：true
* 失敗：false
*/
public function insert($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;
}
}
/**
* 查詢表的記錄數
*
* 參數：
* $table_name:表名
*
* 返回值：表的記錄數
*/
public function count($table_name)
{
$dbname = $this->curr_db_name;
return $this->mongo->$dbname->$table_name->count();
}
/**
* 更新記錄
*
* 參數：
* $table_name:表名
* $condition:更新條件
* $newdata:新的數據記錄
* $options:更新選擇-upsert/multiple
*
* 返回值：
* 成功：true
* 失敗：false
*/
public function update($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;
}
}
/**
* 刪除記錄
*
* 參數：
* $table_name:表名
* $condition:刪除條件
* $options:刪除選擇-justOne
*
* 返回值：
* 成功：true
* 失敗：false
*/
public function remove($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;
} }
/**
* 查找記錄
*
* 參數：
* $table_name:表名
* $query_condition:字段查找條件
* $result_condition:查詢結果限制條件-limit/sort等
* $fields:獲取字段
*
* 返回值：
* 成功：記錄集
* 失敗：false
*/
public function find($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;
}
/**
* 查找一條記錄
*
* 參數：
* $table_name:表名
* $condition:查找條件
* $fields:獲取字段
*
* 返回值：
* 成功：一條記錄
* 失敗：false
*/
public function findOne($table_name, $condition, $fields=array())
{
$dbname = $this->curr_db_name;
return $this->mongo->$dbname->$table_name->findOne($condition, $fields);
}
/**
* 獲取當前錯誤信息
*
* 參數：無
*
* 返回值：當前錯誤信息
*/
public function getError()
{
return $this->error;
}
/*** NewMongodb類** examples:
* $mongo = new NewMongodb("127.0.0.1:11223");
* $mongo->selectDb("test_db");
* 創建索引
* $mongo->ensureIndex("test_table", array("id"=>1), array('unique'=>true));
* 獲取表的記錄
* $mongo->count("test_table");
* 插入記錄
* $mongo->insert("test_table", array("id"=>2, "title"=>"asdqw"));
* 更新記錄
* $mongo->update("test_table", array("id"=>1),array("id"=>1,"title"=>"bbb"));
* 更新記錄-存在時更新，不存在時添加-相當於set
* $mongo->update("test_table", array("id"=>1),array("id"=>1,"title"=>"bbb"),array("upsert"=>1));
* 查找記錄
* $mongo->find("c", array("title"=>"asdqw"), array("start"=>2,"limit"=>2,"sort"=>array("id"=>1)))
* 查找一條記錄
* $mongo->findOne("$mongo->findOne("ttt", array("id"=>1))", array("id"=>1));
* 刪除記錄
* $mongo->remove("ttt", array("title"=>"bbb"));
* 僅刪除一條記錄
* $mongo->remove("ttt", array("title"=>"bbb"), array("justOne"=>1));
* 獲取Mongo操作的錯誤信息
* $mongo->getError();
*/
}
