mongodb和php的用法介绍（代码示例）

$m = new Mongo(); //这里采用默认连接本机的27017端口，当然也可以连接远程主机如  192.168.0.4:27017,如果端口是27017，端口可以省略。

$m = new Mongo("mongodb://${username}:${password}@localhost");

$m = new Mongo("mongodb://127.0.0.1:27017/admin:admin");

selectDB("comedy"); $db = $m->comedy; //选择comedy里面的collection集合，相当于RDBMS里面的表，也可以使用 $collection = $db->collection; $db->selectCollection("collection"); /*********添加一个元素**************/ $obj = array("title" => "php1", "author" => "Bill Watterson"); //将$obj 添加到$collection 集合中 $collection->insert($obj); /*********添加另一个元素**************/ $obj = array("title" => "huaibei", "online" => true); $collection->insert($obj); //$query = array("title" => "huaibei"); $query = array( "_id" => $obj['_id'] ); $cursor = $collection->find($query); //遍历所有集合中的文档 foreach ($cursor as $obj) {    echo $obj["title"] . "n";    echo $obj["_id"] . "n"; } //断开MongoDB连接 $m->close();

mysql: id = 123 mongo: Array(‘id’=>123) mysql: name link ’%bar%’ mongo: array(‘name’ => new MongoRegex(‘/.*bar.*/i’)) mysql: where id > 10 mongo: array(‘id’ => array(‘$gt’ => 10)) mysql: where id >= 10 mongo: array(‘id’ => array(‘$gte’ => 10)) mysql: where id < 10 mongo: array(‘id’ => array(‘$lt’ => 10)) mysql: where id <= 10 mongo: array(‘id’ => array(‘$lte’ => 10)) mysql: where id > 1 and id < 10 mongo: array(‘id’ => array(‘$gt’ => 1,’$lt’ => 10)) mysql: where id <> 10 mongo: array(‘id’ => array(‘$ne’ => 10)) mysql: where id in(123) mongo: array(‘id’ => array(‘$in’ => array(1,2,3))) mysql: where id not in(123) mongo: array(‘id’ => array(‘$nin’ => array(1,2,3))) mysql: where id = 2 or id = 9 mongo: array(‘id’ => array(‘$or’ => array(array(‘id’=>2),array(‘id’=>9)))) mysql: order by name asc mongo: array(‘sort’=>array(‘name’=>1)) mysql: order by name desc mongo: array(‘sort’=>array(‘name’=>-1)) mysql: limit 0,2 mongo: array(‘limit’=>array(‘offset’=>0,’rows’=>2)) mysql: select name,email mongo: array(‘name’,'email’) mysql: select count(name) mongo: array(‘COUNT’) //注意：COUNT为大写

<?php $param = array("name" => "joe"); $Collection->insert($param); $joe = $collection->findOne(array("_id" => $param['_id'])); print_R($joe); $m->close();

<?php $sign = array("title" => 'php1'); $param = array("title" => 'php1','author'=>'test'); $joe = $collection->update($sign, $param);

$m -> dropDB(“comedy”);

$m->listDBs();   //无返回值

<?php $mo = new Mongo(); $db = new MongoDB($mo,’dbname’);//通过创建方式获得一个MongoDB对象

<?php $db = $mo->dbname; $db->drop();

<?php $db = $mo->dbname; $db->_tostring();

//A: $mo = new Mongo(); $coll = $mo->dbname->collname;//获得一个collection对象 //B： $db = $mo->selectDB(’dbname’); $coll = $db->collname; //C: $db = $mo->dbname; $coll = $db->collname; //D: $db = $mo->dbname; $coll = $db->selectCollectoin(’collname’);//获得一个collection对象

$coll = $mo->db->foo; $a = array(’a’=>’b’); $options = array(’safe’=>true); $rs  =$coll->insert($a,$options);

$coll = $mo->db->coll; $c = array(’a’=>1,’s’=>array(’$lt’=>100)); $options = array(’safe’=>true); $rs = $coll->remove($c,$options);

$coll = $mo->db->coll; $c = array(’a’=>1,’s’=>array(’$lt’=>100)); $newobj = array(’e’=>’f’,’x’=>’y’); $options = array(’safe’=>true,’multiple’=>true); $rs = $coll->remove($c,$newobj,$options);

$coll = $mo->db->coll; $query = array(’s’=>array(’$lt’=>100)); $fields = array(’a’=>true,’b’=>true); $rs = $coll->findOne($query,$fields);

$coll = $mo->db->coll; $query = array(’s’=>array(’$lt’=>100)); $fields = array(’a’=>true,’b’=>true); $cursor = $coll->find($query,$fields); //排序 $cursor->sort(array(‘字段’=>-1));(-1倒序，1正序) //跳过部分记录 $cursor->skip(100);跳过100行 //只显示部分记录 $cursor->limit(100);只显示100行 返回一个游标记录对象MongoCursor。

$cursor = $coll->find($query,$fields); while($cursor->hasNext()){ $r = $cursor->getNext(); var_dump($r); } //或者 $cursor = $coll->find($query,$fields); foreache($cursor as $k=>$v){ var_dump($v); } //或者 $cursor = $coll->find($query,$fields); $array= iterator_to_array($cursor);