mongodb php

首先安装扩展，然后才能使用mongodb

一、连接数据库

try {
$mongo = new MongoClient();
$db = $mongo->mydb;
var_dump($db);
} catch (MongoConnectionException $e) {
echo $e->getMessage();
}

该代码可以连接mydb数据库，如果该数据库不存在则自动创建。

二、创建集合

try {
$mongo = new MongoClient();
$db = $mongo->mydb;
$mycol = $db->createCollection('mycol');
var_dump($mycol);
} catch (MongoConnectionException $e) {
echo $e->getMessage();
}

该代码可以创建集合mycol。

三、插入文档

mongodb中使用insert()来插入文档。

try {
$mongo = new MongoClient();
$db = $mongo->mydb;
$mycol = $db->mycol;

$document = array('name' => 'test1' , 'sex' => 'formale' , 'age' => 20);
$res = $mycol->insert($document);
var_dump($res);
} catch (MongoConnectionException $e) {
echo $e->getMessage();
}

输出：

array (size=4)
'ok' => float 1
'n' => int 0
'err' => null
'errmsg' => null

四、查找文档

mongodb使用find()来查找文档

try {
$mongo = new MongoClient();
$db = $mongo->mydb;
$mycol = $db->mycol;

$mongoCursor = $mycol->find();
foreach ($mongoCursor as $document) {
var_dump($document);
}
} catch (MongoConnectionException $e) {
echo $e->getMessage();
}

结果：

array (size=4)
'_id' =>
object(MongoId)[7]
public '$id' => string '56c28a793b22cf5415000029' (length=24)
'name' => string 'test1' (length=5)
'sex' => string 'formale' (length=7)
'age' => int 20

五、更新文档

使用update()来更新文档

try {
$mongo = new MongoClient();
$db = $mongo->mydb;
$mycol = $db->mycol;

$mycol->update(array('name'=>'test1') , array('$set'=>array('age' => 21)));
$mongoCursor = $mycol->find();
foreach ($mongoCursor as $document) {
var_dump($document);
}
} catch (MongoConnectionException $e) {
echo $e->getMessage();
}

结果

array (size=4)
'_id' =>
object(MongoId)[7]
public '$id' => string '56c28a793b22cf5415000029' (length=24)
'name' => string 'test1' (length=5)
'sex' => string 'formale' (length=7)
'age' => int 21

六、删除文档

try {
$mongo = new MongoClient();
$db = $mongo->mydb;
$mycol = $db->mycol;

$mycol->remove(array('name'=>'test1'));
$mongoCursor = $mycol->find();
foreach ($mongoCursor as $document) {
var_dump($document);
}
} catch (MongoConnectionException $e) {
echo $e->getMessage();
}

remove方法

public bool|array MongoCollection::remove ([ array $criteria = array() [, array $options = array() ]] )

options删除的选项：

“w”:抛出异常的级别，默认是1；

“justOne”：最多只删除一个匹配的记录；

“fsync”：Boolean, defaults to

FALSE

. Forces the insert to be synced to disk before returning success. If

TRUE

, an acknowledged insert is implied and will override setting w to 0.

“timeout”：Integer, defaults to MongoCursor::$timeout. If "safe" is set, this sets how long (in milliseconds) for the client to wait for a database response. If the database does not respond within the timeout period, aMongoCursorTimeoutException will be thrown.

......

其他方法可参见php手册：http://php.net/manual/zh/book.mongo.php