PHP操作mongoDB 笔记

连接mongo

    $connection  = new  MongoClient ();  // 连接到 localhost:27017
    $connection  = new  MongoClient (  "mongodb://example.com"  );  // 连接到远程服务器 （使用默认端口： 27017）
    $connection  = new  MongoClient (  "mongodb://example.com:65432"  );  // 链接到远程服务器，使用自定义的端口

这个驱动使用了持久连接，并会在下次试图链接到同一服务器时重用它。

验证

    // Specifying the username and password in the connection URI (preferred)
    $m  = new  MongoClient ( "mongodb:// ${ username } : ${ password } @localhost" );
    // Specifying the username and password via the options array (alternative)
    $m  = new  MongoClient ( "mongodb://localhost" , array( "username"  =>  $username ,  "password"  =>  $password ));
    // Specifying the authentication database in the connection URI (preferred)
    $m  = new  MongoClient ( "mongodb:// ${ username } : ${ password } @localhost/myDatabase" );
    // Specifying the authentication database via the options array (alternative)
    $m  = new  MongoClient ( "mongodb:// ${ username } : ${ password } @localhost" , array( "db"  =>  "myDatabase" ));


分片(集群)

$m  = new  MongoClient ( "mongodb://mongos1.example.com:27017,mongos2.example.com:27017" ));


复制
使用 "replicaSet" 选项指定复制的名字。相同的名字代表在一个集群里. 多个服务器用逗号分割。

    // Using multiple servers as the seed list (prefered)
    $m  = new  MongoClient ( "mongodb://rs1.example.com:27017,rs2.example.com:27017/?replicaSet=myReplSetName" ));
    // Using one server as the seed list
    $m  = new  MongoClient ( "mongodb://rs1.example.com:27017" , array( "replicaSet"  =>  "myReplSetName" ));
    // Using multiple servers as the seed list
    $m  = new  MongoClient ( "mongodb://rs1.example.com:27017,rs2.example.com:27017" , array( "replicaSet"  =>  "myReplSetName" ));


获取数据库实例

    $connection  = new  MongoClient ();
    $db  =  $connection -> dbname ;


获取集合实例

    $connection  = new  MongoClient ();
    $db  =  $connection -> baz ;
     
    // select a collection:
    $collection  =  $db -> foobar ;
     
    // or, directly selecting a database and collection:
    $collection  =  $connection -> baz -> foobar ;


插入一个文档

使用 MongoCollection::insert()  方法：

    $doc  = array(
         "name"  =>  "MongoDB" ,
         "type"  =>  "database" ,
         "count"  =>  1 ,
         "info"  => (object)array(  "x"  =>  203 ,  "y"  =>  102 ),
         "versions"  => array( "0.9.7" ,  "0.9.8" ,  "0.9.9" )
    );
    $collection -> insert (  $doc  );


使用 MongoCollection::findOne()  方法

$document  =  $collection -> findOne ();


添加多个文档:

    for (  $i  =  0 ;  $i  <  100 ;  $i ++ ) {
         $collection -> insert ( array(  'i'  =>  $i ,  "field { $i } "  =>  $i  *  2  ) );
    }


计算文档数量:

echo  $collection -> count ();


使用游标获取所有文档
要活的集合中的所有文档，我们需要 MongoCollection::find()  方法。 find() 方法返回一个 MongoCursor 对象，允许我们遍历整个结果集合来读取文档。

    $cursor  =  $collection -> find ();
    foreach (  $cursor  as  $id  =>  $value  ) {
        echo  " $id : " ;
        var_dump (  $value  );
    }


设置查询条件

    $query  = array(  'i'  =>  71  );
    $cursor  =  $collection -> find (  $query  );
    while (  $cursor -> hasNext () ) {
         var_dump (  $cursor -> getNext () );
    }


建立索引
$collection -> ensureIndex ( array(  "i"  =>  1  ) );   // create index on "i"
$collection -> ensureIndex ( array(  "i"  => - 1 ,  "j"  =>  1  ) );   // index on "i" descending, "j" ascending

SQL 到 Mongo的对应表

SQL查询语句	Mongo查询语句
CREATE TABLE USERS (a Number, b Number)	隐式的创建，或 MongoDB::createCollection() .
INSERT INTO USERS VALUES(1,1)	$db->users->insert(array("a" => 1, "b" => 1));
SELECT a,b FROM users	$db->users->insert(array("a" => 1, "b" => 1));
SELECT * FROM users WHERE age=33	$db->users->find(array("age" => 33));
SELECT a,b FROM users WHERE age=33	$db->users->find(array("age" => 33), array("a" => 1, "b" => 1));
SELECT a,b FROM users WHERE age=33	$db->users->find(array("age" => 33), array("a" => 1, "b" => 1))->sort(array("name" => 1));
SELECT a,b FROM users WHERE age=33	$db->users->find(array("age" => array('$gt' => 33)));
SELECT a,b FROM users WHERE age=33	$db->users->find(array("age" => array('$lt' => 33)));
SELECT * FROM users WHERE name LIKE "%Joe%"	$db->users->find(array("name" => new MongoRegex("/Joe/")));
SELECT * FROM users WHERE name LIKE "Joe%"	$db->users->find(array("name" => new MongoRegex("/^Joe/")));
SELECT * FROM users WHERE age>33 AND age<=40	$db->users->ensureIndex(array("name" => 1));
SELECT * FROM users ORDER BY name DESC	$db->users->ensureIndex(array("name" => 1));
SELECT * FROM users ORDER BY name DESC	$db->users->ensureIndex(array("name" => 1));
CREATE INDEX myindexname ON users(name,ts DESC)	$db->users->ensureIndex(array("name" => 1, "ts" => -1));
SELECT * FROM users WHERE a=1 and b='q'	$db->users->find(array("a" => 1, "b" => "q"));
SELECT * FROM users LIMIT 10 SKIP 20	$db->users->find(array('$or' => array(array("a" => 1), array("b" => 2))));
SELECT * FROM users WHERE a=1 or b=2	$db->users->find(array('$or' => array(array("a" => 1), array("b" => 2))));
SELECT * FROM users LIMIT 1	$db->users->find(array("z" => 3))->explain()
EXPLAIN SELECT * FROM users WHERE z=3	$db->users->find(array("z" => 3))->explain()
SELECT DISTINCT last_name FROM users	$db->command(array("distinct" => "users", "key" => "last_name"));
SELECT COUNT(*y) FROM users	$db->users->count();
SELECT COUNT(*y) FROM users where AGE > 30	$db->users->find(array("age" => array('$gt' => 30)))->count();
SELECT COUNT(AGE) from users	$db->users->update(array("b" => "q"), array('$inc' => array("a" => 2)));
UPDATE users SET a=1 WHERE b='q'	$db->users->update(array("b" => "q"), array('$inc' => array("a" => 2)));
UPDATE users SET a=1 WHERE b='q'	$db->users->update(array("b" => "q"), array('$inc' => array("a" => 2)));
DELETE FROM users WHERE z="abc"	$db->users->remove(array("z" => "abc"));