mongodb+php学习1
1  mongodb启动时，设置启动项

C:\>mongodb\bin\mongod --config C:\mongodb.conf
其中mongodb.conf为：
   dbpath = D:\mongodb_data
logpath = D:\mongodb.log
logappend = true
   如果是linux的话，则mongod --config /etc/mongodb.conf

  

2 停止server
    db.shutdownServer()

3 常用操作:
   use myfirstdb
  插入db
   db.movies.insert({name:"Source Code", genre:"sci-fi", year:2011})
   查找所有记录
   db.movies.find()
4 php 5.2 mongo driver下载：
http://downloads.mongodb.org/mongo-latestphp5.2vc6ts.
zip
  5.3 mongo driver下载：
  http://downloads.mongodb.org/mongo-latest-php5.3vc6ts.zip

   把DLL复制到extension目录，然后
extension=php_mongo.dll即可

5 列出当前数据库的php mongodb程序
   <?php
try{
$mongo = new Mongo(); //create a connection to MongoDB
$databases = $mongo->listDBs(); //List all databases
echo '<pre>';
print_r($databases);
$mongo->close();
} catch(MongoConnectionException $e) {
//handle connection error
die($e->getMessage());
}
?>
    如果是连接时用不同的端口，构造函数中用：
$mongo = new Mongo($server="mongodb://localhost:8888");
  也可以指定timeout的策略；
  try {
$mongo = new Mongo($options=array('timeout'=> 100))
} catch(MongoConnectionException $e) {
die("Failed to connect to database ".$e->getMessage());
}
  
6 通过PHP保存对象到mongo db中
    $connection = new Mongo();
            $database   = $connection->selectDB('myblogsite');
            $collection = $database->selectCollection('articles');
           
            $article               = array();
            $article['title']      = $_POST['title'];
            $article['content']    = $_POST['content'];
            $article['saved_at'] = new MongoDate();
           
            $collection->insert($article);

      注意的是，默认不用显式create database即可，如果不存在则会自动
新建立database,也可以：
   $connection = new Mongo();
$collection = $connection->myblogsite->articles;
    mongodb的插入是异步的，如果不想异步，可以这样；
   try {
$status = $connection->insert(array('title' => 'Blog Title',
'content' => 'Blog Content'),
array('safe' => True));
echo "Insert operation complete";
} catch (MongoCursorException $e) {
die("Insert failed ".$e->getMessage());
}
  则必须等插入完成后才返回给用户，继续执行下一条语句
    也可以指定timeout的策略：
    $collection->insert($document, array('safe' => True,
'timeout' => True));

7 设置自己的自增id
  
    $document = array('_id' => hash('sha1', $username.time()),
     将设置id为username后加上当前时间再hash.

8 日期设置
   $article['saved_at'] = new MongoDate();
   $timestamp = new MongoDate(strtotime('2011-05-21 12:00:00'));
print date('g:i a, F j', $timestamp->sec); //prints 12 pm, May 21

   $lastweek = new MongoDate(strtotime('-1 w