添加文件式缓存

Cache/File.php

@@ -0,0 +1,122 @@
+<?php
+
+namespace TE\Cache;
+
+/**
+ * 文件式缓存
+ *
+ * @uses CacheInterface
+ * @author Byends <byends@gmail.com>
+ * @license GNU General Public License 2.0
+ */
+class File implements CacheInterface
+{
+    /**
+     * 缓存路径
+     */
+    private $_cacheDir;
+
+    /**
+     * 有效时间
+     */
+    private $_lifeTime;
+
+    /**
+     * @param $cacheDir
+     * @param int $lifeTime (0 || null 表示永不过期,默认900秒,15分钟)
+     */
+    public function __construct($cacheDir, $lifeTime = 900)
+    {
+        $this->_cacheDir = rtrim($cacheDir, '/').'/';
+        $this->_lifeTime = $lifeTime;
+    }
+
+    /**
+     * 获取原始对象
+     *
+     * @return mixed
+     */
+    public function getCache()
+    {}
+
+    /**
+     * 设置缓存
+     *
+     * @param string $key
+     * @param string $data
+     */
+    public function set($key, $data)
+    {
+        $data = array(
+            /** 记录时效 */
+            'II' => pack('II', $this->_lifeTime, time()),
+            'data' => $data
+        );
+
+        $content = '<?php ';
+        $content .= 'return ' . var_export($data, true) .';';
+        $content .= '?>';
+
+        /** 写入缓存 */
+        file_put_contents($this->_cacheDir . $key . '.php', $content, LOCK_EX);
+
+        /** 释放内存  */
+        unset($data, $content);
+    }
+
+    /**
+     * 获取缓存
+     *
+     * @param string $key
+     * @return string
+     */
+    public function get($key)
+    {
+        $path = $this->_cacheDir . $key . '.php';
+        $cache = array();
+
+        if (file_exists($path)) {
+            $cache = include $path;
+        }
+
+        if ($cache) {
+            $tmp = isset($cache['II']) && $cache['II'] ? unpack('Il/IL', $cache['II']) : '';
+
+            /** 检测时效性 */
+            if ($tmp && (!$tmp['l'] || (time() - $tmp['L'] <= $tmp['l']))) {
+                return $cache['data'];
+            }
+        }
+
+        /** 清除已经过时的缓存  */
+        @unlink($path);
+        return '';
+    }
+
+    /**
+     * 获取多个缓存
+     *
+     * @param array $keys
+     * @return array
+     */
+    public function getMultiple(array $keys)
+    {
+        $cache = array();
+        foreach ($keys as $v) {
+            $cache[$v] = $this->get($v);
+        }
+
+        return $cache;
+    }
+
+    /**
+     * 删除缓存
+     *
+     * @param string $key
+     */
+    public function remove($key)
+    {
+        $path = $this->_cacheDir . $key . '.php';
+        @unlink($path);
+    }
+}