« MongoGridFS::findOne MongoGridFS::put » PHP Manual MongoGridFS Retrieve a file from the database MongoGridFS::get (PECL mongo >=1.0.8) MongoGridFS::get — Retrieve a file from the database 说明 public MongoGridFS::get ( mixed $id ) : MongoGridFSFile 参数 id _id of the file to find. 返回值 Returns the file, if found, or NULL.