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;      }  }    ?>