PHP操作mongoDB 筆記____PHP

串連mongo

$connection  = new  MongoClient ();  // 串連到 localhost:27017$connection  = new  MongoClient (  "mongodb://example.com"  );  // 串連到遠程伺服器 （使用預設連接埠： 27017）$connection  = new  MongoClient (  "mongodb://example.com:65432"  );  // 連結到遠程伺服器，使用自訂的連接埠

這個驅動使用了持久串連，並會在下次試圖連結到同一伺服器時重用它。

驗證

// 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" ));

分區(叢集)

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

複製
使用 "replicaSet" 選項指定複製的名字。相同的名字代表在一個叢集裡. 多個伺服器用逗號分割。

// 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" ));

擷取資料庫執行個體

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

擷取集合執行個體

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

插入一個文檔

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 ();

添加多個文檔:

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

計算文檔數量:

echo  $collection -> count ();

使用遊標擷取所有文檔
要活的集合中的所有文檔，我們需要 MongoCollection::find()  方法。 find() 方法返回一個 MongoCursor 對象，允許我們遍曆整個結果集合來讀取文檔。

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

設定查詢條件

$query  = array(  'i'  =>  71  );$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的對應表

SQL查詢語句	Mongo查詢語句
CREATE TABLE USERS (a Number, b Number)	隱式的建立，或 MongoDB::createCollection() .
INSERT INTO USERS VALUES(1,1)	$db->users->insert(array("a" => 1, "b" => 1));
SELECT a,b FROM users	$db->users->find(array(), 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 ORDER BY name	$db->users->find(array("age" => 33), array("a" => 1, "b" => 1))->sort(array("name" => 1));
SELECT * FROM users WHERE age>33	$db->users->find(array("age" => array('$gt' => 33)));
SELECT * 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	$db->users->find(array("age" => array('$gt' => 33, '$lte' => 40)));
SELECT * FROM users ORDER BY name DESC	$db->users->find()->sort(array("name" => -1));
CREATE INDEX myindexname ON users(name)	$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()->limit(10)->skip(20);
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()->limit(1);
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	$db->users->find(array("age" => array('$exists' => true)))->count();
UPDATE users SET a=1 WHERE b='q'	$db->users->update(array("b" => "q"), array('$set' => array("a" => 1)));
UPDATE users SET a=a+2 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"));