<?php/**ob_start();ob_get_contents();ob_end_flush();****php页面缓存的使用方法，php页面缓存的小例子，如果数据库查询量较大，可以用cache来解决**/functioncache_start($dir,$expiretime){$filename=$dir.'\\'.sha1($_SERVER['REQUEST_URI']).'.html';ob_start();if(file_exists($filename)&&(time()-filemtime($filename)<$expiretime)){include($filename);ob_end_flush();exit();}mkdir($dir);}functioncache_end($dir){$filename=$dir.'\\'.sha1($_SERVER['REQUEST_URI']).'.html';echo$filename;$fp=fopen($filename,'w');fwrite($fp,ob_get_contents());fclose($fp);ob_end_flush();}$dir="D:\\\\php";cache_start($dir,10);cache_end($dir);