<?php

start(array(

'index_file' => dirname(__FILE__) . '/default.php', //你首页的文件名

'cache_file' => dirname(__FILE__) . '/cache/index/index.html', //要缓存的文件名

'expire_seconds' => 3600, //过期的秒数（60秒=1分钟）

));

function start($config) {

$remain_seconds = $file_timestamp = 0;

if (hasCached($config, $remain_seconds, $file_timestamp)) {

$html = '';

//$html .= '<!-- [当前为缓存页面，距离更新还有剩余' . $remain_seconds . '秒] -->' . "\r\n";

// $html .= '<!-- [该缓存页面生成于' . date('Y-m-d H:i:s', $file_timestamp) . '] -->' . "\r\n";

$html .= file_get_contents($config['cache_file']);

die($html);

}

ob_start();

include($config['index_file']);

$content = ob_get_contents();

file_put_contents($config['cache_file'], $content);

}

function hasCached($config, &$remain_seconds, &$file_timestamp) {

if (!file_exists($config['cache_file'])) {

return FALSE;

}

if (filesize($config['cache_file']) === 0) {

return FALSE;

}

$file_timestamp = filemtime($config['cache_file']);

$remain_seconds = $config['expire_seconds'] - (time() - $file_timestamp);

if ($remain_seconds <= 0) {

return FALSE;

}

return TRUE;

}