实现PHP页面静态化

";
			echo file_get_contents("static.html");
			$end_time   = microtime();
			echo "静态文件使用时间:".($end_time-$start_time);
			exit;
		}
	}
	//如果是首次访问，或者是上次缓存的时间超过3分钟，则从数据库中读取数据
	$host     = "127.0.0.1";
	$user     = "root";
	$password = "123456";
	//记录开始时间
	$start_time = microtime();
	mysql_connect($host,$user,$password);
	mysql_select_db("mydb");
	mysql_query("set names utf8");
	
	$sql 		= "SELECT name,address,email FROM users";
	$resource 	= mysql_query($sql);
	echo "我是从数据库中读取的数据:
";
	ob_start();//打开输出缓冲
	echo "";
	//输出取得的信息
	while($userInfo = mysql_fetch_assoc($resource)){
		echo "";
		echo "";
		echo "";
		echo "";
		echo "";
	}
	$end_time=microtime();
	$str=ob_get_contents();//获取缓冲区的内容
	ob_end_flush();
	echo "从数据库读数据的时间:".($end_time-$start_time);
	file_put_contents("static.html",$str);
?>
姓名
地址
Email
".$userInfo['name']."
".$userInfo['address']."
".$userInfo['email']."