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<?php
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// +----------------------------------------------------------------------
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// | ThinkPHP [ WE CAN DO IT JUST THINK ]
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// +----------------------------------------------------------------------
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// | Copyright (c) 2006~2016 http://thinkphp.cn All rights reserved.
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// +----------------------------------------------------------------------
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// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
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// +----------------------------------------------------------------------
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// | Author: liu21st <liu21st@gmail.com>
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// +----------------------------------------------------------------------
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namespace think\sae;
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use think\Exception;
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class Template
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{
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// mc 对象
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private $mc;
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// 编译缓存内容
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private $contents = [];
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/**
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* 架构函数
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* @access public
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*/
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public function __construct()
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{
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if (!function_exists('sae_debug')) {
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throw new Exception('请在SAE平台上运行代码。');
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}
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$this->mc = new \Memcached();
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if (!$this->mc) {
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throw new Exception('您未开通Memcache服务，请在SAE管理平台初始化Memcache服务');
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}
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}
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/**
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* 写入编译缓存
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* @param string $cacheFile 缓存的文件名
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* @param string $content 缓存的内容
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* @return void|array
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*/
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public function write($cacheFile, $content)
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{
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// 添加写入时间
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$content = $_SERVER['REQUEST_TIME'] . $content;
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if (!$this->mc->set($cacheFile, $content, 0)) {
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throw new Exception('sae mc write error:' . $cacheFile);
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} else {
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$this->contents[$cacheFile] = $content;
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return true;
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}
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}
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/**
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* 读取编译编译
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* @param string $cacheFile 缓存的文件名
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* @param array $vars 变量数组
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* @return void
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*/
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public function read($cacheFile, $vars = [])
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{
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if (!empty($vars) && is_array($vars)) {
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extract($vars, EXTR_OVERWRITE);
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}
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eval('?>' . $this->get($cacheFile, 'content'));
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}
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/**
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* 检查编译缓存是否有效
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* @param string $cacheFile 缓存的文件名
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* @param int $cacheTime 缓存时间
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* @return boolean
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*/
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public function check($cacheFile, $cacheTime)
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{
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$mtime = $this->get($cacheFile, 'mtime');
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if (0 != $cacheTime && $_SERVER['REQUEST_TIME'] > $mtime + $cacheTime) {
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// 缓存是否在有效期
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return false;
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}
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return true;
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}
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/**
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* 读取文件信息
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* @access private
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* @param string $filename 文件名
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* @param string $name 信息名 mtime或者content
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* @return boolean
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*/
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private function get($filename, $name)
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{
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if (!isset($this->contents[$filename])) {
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$this->contents[$filename] = $this->mc->get($filename);
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}
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$content = $this->contents[$filename];
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if (false === $content) {
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return false;
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}
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$info = array(
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'mtime' => substr($content, 0, 10),
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'content' => substr($content, 10),
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);
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return $info[$name];
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}
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}
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