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thinkphp/library/think/template/driver/File.php

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+<?php
+// +----------------------------------------------------------------------
+// | ThinkPHP [ WE CAN DO IT JUST THINK ]
+// +----------------------------------------------------------------------
+// | Copyright (c) 2006~2017 http://thinkphp.cn All rights reserved.
+// +----------------------------------------------------------------------
+// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
+// +----------------------------------------------------------------------
+// | Author: liu21st <liu21st@gmail.com>
+// +----------------------------------------------------------------------
+
+namespace think\template\driver;
+
+use think\Exception;
+
+class File
+{
+    /**
+     * 写入编译缓存
+     * @param string $cacheFile 缓存的文件名
+     * @param string $content 缓存的内容
+     * @return void|array
+     */
+    public function write($cacheFile, $content)
+    {
+        // 检测模板目录
+        $dir = dirname($cacheFile);
+        if (!is_dir($dir)) {
+            mkdir($dir, 0755, true);
+        }
+        // 生成模板缓存文件
+        if (false === file_put_contents($cacheFile, $content)) {
+            throw new Exception('cache write error:' . $cacheFile, 11602);
+        }
+    }
+
+    /**
+     * 读取编译编译
+     * @param string  $cacheFile 缓存的文件名
+     * @param array   $vars 变量数组
+     * @return void
+     */
+    public function read($cacheFile, $vars = [])
+    {
+        if (!empty($vars) && is_array($vars)) {
+            // 模板阵列变量分解成为独立变量
+            extract($vars, EXTR_OVERWRITE);
+        }
+        //载入模版缓存文件
+        include $cacheFile;
+    }
+
+    /**
+     * 检查编译缓存是否有效
+     * @param string  $cacheFile 缓存的文件名
+     * @param int     $cacheTime 缓存时间
+     * @return boolean
+     */
+    public function check($cacheFile, $cacheTime)
+    {
+        // 缓存文件不存在, 直接返回false
+        if (!file_exists($cacheFile)) {
+            return false;
+        }
+        if (0 != $cacheTime && $_SERVER['REQUEST_TIME'] > filemtime($cacheFile) + $cacheTime) {
+            // 缓存是否在有效期
+            return false;
+        }
+        return true;
+    }
+}