$mongodb = new Mongo();

//$connection = new Mongo( "$dburl:$port" ); // connect to a remote host (default port)

$mydb = $mongodb->mydb;  //隱性創(chuàng)建數(shù)據(jù)庫mydb

$mydb = $mongodb->selectDB("mydb");  //直接選擇已經(jīng)存在的數(shù)據(jù)庫

$collection = $mydb->mycollect;   //選擇所用文集，如果不存在，自動創(chuàng)建

$collection = $db->selectCollection('mydb');   //只選擇，不創(chuàng)建

//插入新紀錄

$collection->insert(array("name"=>"l4yn3", "age"=>"10", "sex":"unknow"));

//修改記錄

$where = array("name"=>"l4yn3");

$update_item = array('$set'=>array("age"=>"15", "sex":"secret"));

$collection->update($where, $update_item);

$options['multiple'] = true; //默認是 false，是否改變匹配的多行

$collection->update($where, $update_item, $options);

//查詢記錄

$myinfo = $collection->findOne(array("name"=>"l4yn3"));

$myinfo = $collection->findOne(array("name"=>
"l4yn3"), array("age"=>"15"));

//按條件查找：
$query = array("name"=>"l4yn3");
$cursor = $collection->find($query); //在$collectio集合中查找滿足$query的文檔
while($cursor->hasNext())
{
var_dump($cursor->getNext()); //返回了數(shù)組
}

//返回文檔記錄數(shù)量

$collection->count();

//刪除一個數(shù)據(jù)庫：
$connection->dropDB("...");

//列出所有可用數(shù)據(jù)庫：
$m->listDBs(); //無返回值
//關(guān)閉連接：
$connection->close();

php各種連接mongodb數(shù)據(jù)庫的參數(shù)方式

//連接localhost:27017
$conn = new Mongo();
//連接遠程主機默認端口
$conn = new Mongo('test.com');
//連接遠程主機22011端口
$conn = new Mongo('test.com:22011');
//MongoDB有用戶名密碼
$conn = new Mongo("mongodb://${username}:${password}@localhost")
//MongoDB有用戶名密碼并指定數(shù)據(jù)庫blog
$conn = new Mongo("mongodb://${username}:${password}@localhost/blog");
//多個服務(wù)器
$conn = new Mongo("mongodb://localhost:27017,localhost:27018");