<?php
class Metadata
{
	private $db;				//传入PDO对象.
	
	//使用到的公共变量
	public $tbl_metadata = "metadata";
	
	function __construct($db)
	{
		$this->db = $db;
	}
	
	function view($uuid)
	{
		$sql = "SELECT * FROM ".$this->tbl_metadata." WHERE uuid='$uuid'";
		$rs = $this->db->query($sql);
		return $rs->fetch();
	}
}