php mongodb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 * $mongo->update("test_table", array("id"=>1),array("id"=<p style="color:transparent">来源gao!daima.com搞$代!码网</p>>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(); */ }