mongodb和php的用法詳解

更新時(shí)間：2019年03月25日 08:39:51 投稿：laozhang

在本篇文章中小編給大家分享了關(guān)于mongodb和php的用法以及相關(guān)知識(shí)點(diǎn)，需要的朋友們學(xué)習(xí)下。

Mognodb數(shù)據(jù)庫(kù)連接.

默認(rèn)格式

$m = new Mongo();

//這里采用默認(rèn)連接本機(jī)的27017端口，當(dāng)然也可以連接遠(yuǎn)程主機(jī)如 192.168.0.4:27017,如果端口是27017，端口可以省略。

標(biāo)準(zhǔn)連接

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

實(shí)例：

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

數(shù)據(jù)庫(kù)的用戶名和密碼都是admin

數(shù)據(jù)庫(kù)操作

插入數(shù)據(jù)

<?php

//這里采用默認(rèn)連接本機(jī)的27017端口，當(dāng)然你也可以連接遠(yuǎn)程主機(jī)如192.168.0.4:27017

//如果端口是27017，端口可以省略

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

//選擇comedy數(shù)據(jù)庫(kù)，如果以前沒(méi)該數(shù)據(jù)庫(kù)會(huì)自動(dòng)創(chuàng)建，也可以用$m->selectDB("comedy");

$db = $m->comedy;

//選擇comedy里面的collection集合，相當(dāng)于RDBMS里面的表，也可以使用

$collection = $db->collection;

$db->selectCollection("collection");

/*********添加一個(gè)元素**************/

$obj = array("title" => "php1", "author" => "Bill Watterson");

//將$obj 添加到$collection 集合中

$collection->insert($obj);

/*********添加另一個(gè)元素**************/

$obj = array("title" => "huaibei", "online" => true);

$collection->insert($obj);

//$query = array("title" => "huaibei");

$query = array( "_id" => $obj['_id'] );

$cursor = $collection->find($query);

//遍歷所有集合中的文檔

foreach ($cursor as $obj) {

  echo $obj["title"] . "\n";

  echo $obj["_id"] . "\n";

}

//斷開(kāi)MongoDB連接

$m->close();

帶條件的查詢

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為大寫(xiě)

查詢時(shí)，每個(gè)Object插入時(shí)都會(huì)自動(dòng)生成一個(gè)獨(dú)特的_id,它相當(dāng)于RDBMS中的主鍵，用于查詢時(shí)非常方便（_id每一都不同，很像自動(dòng)增加的id）

<?php

$param = array("name" => "joe");

$collection->insert($param);

$joe = $collection->findOne(array("_id" => $param['_id']));

print_R($joe);

$m->close();

返回結(jié)果：Array ( [_id] => MongoId Object ( [$id] => 4fd30e21870da83416000002 ) [name] => joe )

更改字段值

<?php

$sign = array("title" => 'php1');

$param = array("title" => 'php1','author'=>'test');

$joe = $collection->update($sign, $param);

刪除一個(gè)數(shù)據(jù)庫(kù)

$m -> dropDB(“comedy”);

列出所有可用數(shù)據(jù)庫(kù)

$m->listDBs();  //無(wú)返回值

創(chuàng)建一個(gè)MongoDB對(duì)象

<?php

$mo = new Mongo();

$db = new MongoDB($mo,'dbname');//通過(guò)創(chuàng)建方式獲得一個(gè)MongoDB對(duì)象

刪除當(dāng)前DB

<?php

$db = $mo->dbname;

$db->drop();

獲得當(dāng)前數(shù)據(jù)庫(kù)名

<?php

$db = $mo->dbname;

$db->_tostring();

選擇想要的collection:

//A:

$mo = new Mongo();

$coll = $mo->dbname->collname;//獲得一個(gè)collection對(duì)象

//B：

$db = $mo->selectDB('dbname');

$coll = $db->collname;

//C:

$db = $mo->dbname;

$coll = $db->collname;

//D:

$db = $mo->dbname;

$coll = $db->selectCollectoin('collname');//獲得一個(gè)collection對(duì)象

插入數(shù)據(jù)（MongoCollection對(duì)象

$coll = $mo->db->foo;

$a = array('a'=>'b');

$options = array('safe'=>true);

$rs =$coll->insert($a,$options);

刪除數(shù)據(jù)庫(kù)中的記錄（MongoCollection對(duì)象）

$coll = $mo->db->coll;

$c = array('a'=>1,'s'=>array('$lt'=>100));

$options = array('safe'=>true);

$rs = $coll->remove($c,$options);

更新數(shù)據(jù)庫(kù)中的記錄（MongoCollection對(duì)象）

$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);

查詢collection獲得單條記錄（MongoCollection類）

$coll = $mo->db->coll;

$query = array('s'=>array('$lt'=>100));

$fields = array('a'=>true,'b'=>true);

$rs = $coll->findOne($query,$fields);

查詢collection獲得多條記錄（MongoCollection類）

$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)

//跳過(guò)部分記錄

$cursor->skip(100);跳過(guò)100行

//只顯示部分記錄

$cursor->limit(100);只顯示100行

返回一個(gè)游標(biāo)記錄對(duì)象MongoCursor。

針對(duì)游標(biāo)對(duì)象MongoCursor的操作(MongoCursor類)

$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);

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