原cache驱动Simple改名Lite，增加有效期支持

2026-07-06 07:02:47 +08:00 · 2016-01-26 13:56:54 +08:00
parent 298202984d
commit 64bb1f4b23
1 changed files with 28 additions and 6 deletions
--- a/library/think/cache/driver/Lite.php
+++ b/library/think/cache/driver/Lite.php
@@ -0,0 +1,139 @@
+<?php
+// +----------------------------------------------------------------------
+// | ThinkPHP [ WE CAN DO IT JUST THINK ]
+// +----------------------------------------------------------------------
+// | Copyright (c) 2006~2016 http://thinkphp.cn All rights reserved.
+// +----------------------------------------------------------------------
+// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
+// +----------------------------------------------------------------------
+// | Author: liu21st <liu21st@gmail.com>
+// +----------------------------------------------------------------------
+
+namespace think\cache\driver;
+
+use think\Cache;
+
+/**
+ * 文件类型缓存类
+ * @author    liu21st <liu21st@gmail.com>
+ */
+class Lite
+{
+
+    protected $options = [
+        'prefix' => '',
+        'path'   => '',
+        'expire' => 0, // 等于 10*365*24*3600（10年）
+    ];
+
+    /**
+     * 架构函数
+     * @access public
+     *
+     * @param array $options
+     */
+    public function __construct($options = [])
+    {
+        if (!empty($options)) {
+            $this->options = array_merge($this->options, $options);
+        }
+        if (substr($this->options['path'], -1) != '/') {
+            $this->options['path'] .= '/';
+        }
+
+    }
+
+    /**
+     * 取得变量的存储文件名
+     * @access private
+     * @param string $name 缓存变量名
+     * @return string
+     */
+    private function filename($name)
+    {
+        return $this->options['path'] . $this->options['prefix'] . md5($name) . '.php';
+    }
+
+    /**
+     * 读取缓存
+     * @access public
+     * @param string $name 缓存变量名
+     * @return mixed
+     */
+    public function get($name)
+    {
+        Cache::$readTimes++;
+        $filename = $this->filename($name);
+        if (is_file($filename)) {
+            // 判断是否过期
+            $mtime = filemtime($filename);
+            if ($mtime<time()) {
+                // 清除已经过期的文件
+                unlink($filename);
+                return false;
+            }
+            return include $filename;
+        } else {
+            return false;
+        }
+    }
+
+    /**
+     * 写入缓存
+     * @access   public
+     *
+     * @param string $name  缓存变量名
+     * @param mixed  $value 存储数据
+     * @internal param int $expire 有效时间 0为永久
+     *
+     * @return bool
+     */
+    public function set($name, $value, $expire=null)
+    {
+        Cache::$writeTimes++;
+        if (is_null($expire)) {
+            $expire = $this->options['expire'];
+        }
+        // 模拟永久
+        if (0===$expire) {
+            $expire = 10*365*24*3600;
+        }
+        $filename = $this->filename($name);
+        // 缓存数据
+        /*
+        $dir = dirname($filename);
+        // 目录不存在则创建
+        if (!is_dir($dir))
+            mkdir($dir,0755,true);
+        */
+        $ret = file_put_contents($filename, ("<?php\treturn " . var_export($value, true) . ";?>"));
+        // 通过设置修改时间实现有效期
+        if ($ret) {
+            touch($filename, time()+$expire);
+        }
+        return $ret;
+    }
+
+    /**
+     * 删除缓存
+     * @access public
+     * @param string $name 缓存变量名
+     * @return boolean
+     */
+    public function rm($name)
+    {
+        return unlink($this->filename($name));
+    }
+
+    /**
+     * 清除缓存
+     * @access   public
+     * @return bool
+     * @internal param string $name 缓存变量名
+     */
+    public function clear()
+    {
+        $filename = $this->filename('*');
+        array_map("unlink", glob($filename));
+    }
+}