Mognodb数据库连接.
默认格式
$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。
标准连接
$m = new Mongo("mongodb://${username}:${password}@localhost");
实例:
$m = new Mongo("mongodb://127.0.0.1:27017/admin:admin");
数据库的用户名和密码都是admin
数据库操作
插入数据
<?php
//这里采用默认连接本机的27017端口,当然你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
$m = new Mongo("mongodb://127.0.0.1:27017/admin:admin");
//选择comedy数据库,如果以前没该数据库会自动创建,也可以用$m- 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
$m- close();
带条件的查询
mysql: id = 123
mongo: array(‘id'= 123)
mysql: name link '%bar%'
mongo: array(‘name' = new MongoRegex(‘/.*bar.*/i'))
mysql: where id 10
mongo: array(‘id' = array(‘$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
查询时,每个Object插入时都会自动生成一个独特的_id,它相当于RDBMS中的主键,用于查询时非常方便 (_id每一都不同,很像自动增加的id)
<?php
$param = array("name" = "joe");
$collection- insert($param);
$joe = $collection- findOne(array("_id" = $param['_id']));
print_R($joe);
$m- close();
返回结果:Array ( [_id] = MongoId Object ( [$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);
删除一个数据库
$m - dropDB(“comedy”);
列出所有可用数据库
$m- listDBs(); //无返回值
创建一个MongoDB对象
<?php
$mo = new Mongo();
$db = new MongoDB($mo,'dbname');//通过创建方式获得一个MongoDB对象
删除当前DB
<?php
$db = $mo- dbname;
$db- drop();
获得当前数据库名
<?php
$db = $mo- dbname;
$db- _tostring();
选择想要的collection:
//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
插入数据(MongoCollection对象
$coll = $mo- db- foo;
$a = array('a'= 'b');
$options = array('safe'= true);
$rs =$coll- insert($a,$options);
删除数据库中的记录(MongoCollection对象)
$coll = $mo- db- coll;
$c = array('a'= 1,'s'= array('$lt'= 100));
$options = array('safe'= true);
$rs = $coll- remove($c,$options);
更新数据库中的记录(MongoCollection对象)
$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);
查询collection获得单条记录(MongoCollection类)
$coll = $mo- db- coll;
$query = array('s'= array('$lt'= 100));
$fields = array('a'= true,'b'= true);
$rs = $coll- findOne($query,$fields);
查询collection获得多条记录(MongoCollection类)
$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。
针对游标对象MongoCursor的操作(MongoCursor类)
$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);