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  3. 优先级与环境变量的艺术驾驭 Linux 系统的核心
$header['title'] = empty($read['title']) ? $read['name'] : $read['title']; $header['mobile_link'] = url('tag-' . $tagid, $extra); $header['keywords'] = empty($read['keywords']) ? $read['name'] : $read['keywords']; $header['description'] = empty($read['description']) ? $read['name'] : $read['description']; $_SESSION['fid'] = 0; if ($ajax) { $apilist['header'] = $header; $apilist['extra'] = $extra; $apilist['tag'] = $read; $apilist['num'] = $num; $apilist['page'] = $page; $apilist['pagesize'] = $pagesize; $apilist['page_url'] = $page_url; $apilist['threadlist'] = $threadlist; $conf['api_on'] ? message(0, $apilist) : message(0, lang('closed')); } else { include _include(theme_load('tag', $tagid)); } break; } ?>