mongodb php增删改查基本操作

刚学习mongodb，现在网上的资料还比较少，读了一本mongodb权威指南，介绍的内容不是很全面。七零八凑找了些对mongo数据库的基本增删改查操作。

$mongo = new Mongo();$db = $mongo->selectDB('test');$collection = $db->selectCollection('foo');//插入$array = array('name'=>'张三','sex'=>'male');$bool = $collection->insert($array);//更新$where = array('name'=>'张三');$newdata = array('name'=>'张三','sex'=>'female');$bool = $collection->update($where,array('$set',$newdata));//批量更新$where = array('y'=>'9');$newdata = array('y'=>10);$bool = $collection->update($where,array('$set'=>$newdata),array("multiple" => true));//删除字段$where = array('a'=>'1');$bool = $collection->update(array('b'=>'t'),array('$unset'=>array('c'=>1)));echo '<pre>';var_dump($bool);exit;//$push$bool = $collection->update(array('a'=>'1'),array('$push'=>array('c'=>'wow')));echo '<pre>';var_dump($bool);exit;//删除文档$where = array('name'=>'张三');$bool = $collection->remove($where);//group$keys = array("category" => 1);$initial = array("count" => 0);$reduce = "function (obj, prev) { prev.count++ }";$condition = array('condition' => array('category' => array( '$exists' => 1)));$g = $collection->group($keys, $initial, $reduce, $condition);echo '<pre>';print_r($g);exit;//distinct$retval = $collection->distinct("zip-code",array('stuff'=>'foo'));//查询,sort$where = array('y'=>array('$exists'=>true,'$gte'=>5,'$lt'=>10));$result = $collection->find($where)->sort(array('y'=>-1));$arr = array();foreach($result as $key=>$value){        $arr[] = $value;}echo '<pre>';print_r($arr);