?php
//初始化gridfs
$conn = new Mongo(); //連接MongoDB
$db = $conn->photos; //選擇數(shù)據(jù)庫
$grid = $db->getGridFS(); //取得gridfs對象
 

$id = $grid->storeUpload('upfile');//相當于
$id = $grid->storeFile($_FILES[‘upfile'][‘tmp_name']);
//--------------以上是保存圖片--下面開始讀取圖片----------------//
保存成功后返回$id = md5字符串$logo = $grid->findOne(array('_id'=>$id));
 //以_id為索引取得文件
header('Content-type: image/png'); 
//輸出圖片頭
echo $logo ->getBytes(); 
//輸出數(shù)據(jù)流?>