$cachetime = 360;//6小时更新一次首页

 

if($cachetime) {

$cachefile = S_ROOT.'./data/data_index.php';

$lockfile = S_ROOT.'./data/data_index.lock';

if(file_exists($cachefile)) {

@$mktime = filemtime($cachefile);

if($_SGLOBAL['timestamp'] - $mktime > $cachetime*60) {

if(file_exists($lockfile)) {

$writestate = false;

@touch($lockfile);

}

} else {

include_once($cachefile);

$cachelost = false;

}

}

}