网页全站静态化

<?php
if(!function_exists(\'putfile\')){
    function putfile($file) {
        $stat = @stat ( $file );
        $etag = sprintf ( \'%x-%x-%x\', $stat [\'ino\'], $stat [\'size\'], $stat [\'mtime\'] * 1000000 );

        if (isset ( $_SERVER [\'HTTP_IF_NONE_MATCH\'] ) && $_SERVER [\'HTTP_IF_NONE_MATCH\'] == $etag) { // 火狐浏览器为HTTP_IF_NONE_MATCH
            header ( \'Etag:\' . $etag, true, 304 );
            exit ();
        } elseif (isset ( $_SERVER [\'HTTP_IF_MODIFIED_SINCE\'] ) && strtotime ( $_SERVER [\'HTTP_IF_MODIFIED_SINCE\'] ) >= $stat [\'mtime\']) { // IE浏览器为HTTP_IF_MODIFIED_SINCE，$stat[\'mtime\']文件修改时间
            // header(\'Last-Modified: \' . date(\'r\', $stat[\'mtime\']));
            header ( \'Etag:\' . $etag, true, 304 );
            exit ();
        }

        header ( "Content-type:text/html;charset=utf-8" );
        header ( \'Last-Modified: \' . date ( \'r\', $stat [\'mtime\'] ) );
        header ( \'Etag: "\' . $etag . \'"\' );
        if (readfile ( $file ) === false) {
            header ( \'HTTP/1.0 500 Internal Server Error\' );
        }
    }
}
if(!function_exists(\'cache_info\')) {
    function cache_info($file, $dir = \'\')
    {
        $file = $dir ? DT_CACHE . \'/\' . $dir . \'/\' . $file : DT_CACHE . \'/\' . $file;
        if (!is_file($file)) return \'\';
        $info = [
            \'filepath\' => $file,
            \'filesize\' => filesize($file),
            \'filectime\' => filectime($file),
            \'filemtime\' => filemtime($file),
            \'fileatime\' => fileatime($file),
        ];
        return $info;
    }
}
/**
 * 缓存生成定义，有缓存且未过期，直接输出
 * @param $url
 */
function lyf_cachehtml_begin($url){
    global $CFG;
    if(empty($url) || strpos($url,\'?\')!==false)return;
    $cache_html_flag = 0;
    $cache_html_intvaltime = 180;
    $cache_pdir = \'cachehtml\';
    $cache_split = \'/\';
    if(!DT_DEBUG){//非调试模式
        if(defined(\'DT_WAP\')){//M端缓存
            $cache_html_flag = 1;
        }
        if($cache_html_flag){
            $cache_urls = pathinfo($url);
            $cache_file = str_replace([\'.shtml\',\'.html\',\'.htm\'],\'\',$cache_urls[\'basename\']).\'.html\';
            $cache_urlinfos = explode(\'/\',str_replace(get_env(\'scheme\').$_SERVER[\'HTTP_HOST\'],\'\',$url));
            $cache_urlinfos = array_filter($cache_urlinfos,function ($v){
                return !empty($v) && strpos($v,\'.\')===false ;
            });
            $cache_host = get_env(\'host\');
            $cache_domain = str_replace($CFG[\'cookie_domain\'], \'\', $cache_host);
            $cache_dir = $cache_pdir.$cache_split.$cache_domain.$cache_split.join($cache_split,$cache_urlinfos);
            $cache_info = cache_info($cache_file,$cache_dir);
            $filepath = DT_CACHE.$cache_split.$cache_dir.$cache_split.$cache_file;
            if(empty($cache_info) || time() - $cache_info[\'filemtime\'] > $cache_html_intvaltime){//生成缓存
                defined(\'DT_CACHEHTM\') or define(\'DT_CACHEHTM\', true);
                defined(\'DT_CACHEHTM_PATH\') or define(\'DT_CACHEHTM_PATH\', $filepath);
                ob_start();
            }else{
                if(is_file($filepath) ) {
                    putfile($filepath);
                    exit();
                }
            }
        }
    }
}

function lyf_cachehtml_end(){
    if(defined(\'DT_CACHEHTM\') && defined(\'DT_CACHEHTM_PATH\')){
        $data = ob_get_contents();
        //ob_clean();
        file_put(DT_CACHEHTM_PATH, $data);
        ob_end_flush();
    }

}
//生成缓存
lyf_cachehtml_begin($DT_URL);