PHP  MongoDB GridFS 存储文件的方法详解

<?php//初始化gridfs$conn = new Mongo(); //连接MongoDB$db = $conn->photos; //选择数据库$grid = $db->getGridFS(); //取得gridfs对象 

$id = $grid->storeUpload('upfile');//相当于$id = $grid->storeFile($_FILES[‘upfile'][‘tmp_name']);//--------------以上是保存图片--下面开始读取图片----------------//保存成功后返回$id = md5字符串$logo = $grid->findOne(array('_id'=>$id)); //以_id为索引取得文件header('Content-type: image/png'); //输出图片头echo $logo ->getBytes(); //输出数据流?>