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這期內(nèi)容當(dāng)中小編將會(huì)給大家?guī)碛嘘P(guān)mongodb怎么在php項(xiàng)目中使用,文章內(nèi)容豐富且以專業(yè)的角度為大家分析和敘述,閱讀完這篇文章希望大家可以有所收獲。
Mognodb數(shù)據(jù)庫連接.
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)庫的用戶名和密碼都是admin
數(shù)據(jù)庫操作
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 $m = new Mongo("mongodb://127.0.0.1:27017/admin:admin"); //選擇comedy數(shù)據(jù)庫,如果以前沒該數(shù)據(jù)庫會(huì)自動(dòng)創(chuàng)建,也可以用$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
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
$m -> dropDB(“comedy”);
列出所有可用數(shù)據(jù)庫
$m->listDBs(); //無返回值
創(chuàng)建一個(gè)MongoDB對象
<?php $mo = new Mongo(); $db = new MongoDB($mo,'dbname');//通過創(chuàng)建方式獲得一個(gè)MongoDB對象
刪除當(dāng)前DB
<?php $db = $mo->dbname; $db->drop();
獲得當(dāng)前數(shù)據(jù)庫名
<?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對象
插入數(shù)據(jù)(MongoCollection對象
$coll = $mo->db->foo; $a = array('a'=>'b'); $options = array('safe'=>true); $rs =$coll->insert($a,$options);
刪除數(shù)據(jù)庫中的記錄(MongoCollection對象)
$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)庫中的記錄(MongoCollection對象)
$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) //跳過部分記錄 $cursor->skip(100);跳過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)記錄對象MongoCursor。
針對游標(biāo)對象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);
上述就是小編為大家分享的mongodb怎么在php項(xiàng)目中使用了,如果剛好有類似的疑惑,不妨參照上述分析進(jìn)行理解。如果想知道更多相關(guān)知識,歡迎關(guān)注億速云行業(yè)資訊頻道。
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