改进Cache类 及 驱动 改进Connection类及驱动

library/think/cache/driver/File.php

@@ -17,7 +17,7 @@ use think\Cache;
  * 文件类型缓存类
  * @author    liu21st <liu21st@gmail.com>
  */
-class File implements CacheInterface
+class File
 {
 
     protected $options = [
@@ -98,7 +98,6 @@ class File implements CacheInterface
         if (!is_file($filename)) {
             return false;
         }
-        Cache::$readTimes++;
         $content = file_get_contents($filename);
         if (false !== $content) {
             $expire = (int) substr($content, 8, 12);
@@ -129,7 +128,6 @@ class File implements CacheInterface
      */
     public function set($name, $value, $expire = null)
     {
-        Cache::$writeTimes++;
         if (is_null($expire)) {
             $expire = $this->options['expire'];
         }
@@ -142,25 +140,6 @@ class File implements CacheInterface
         $data   = "<?php\n//" . sprintf('%012d', $expire) . $data . "\n?>";
         $result = file_put_contents($filename, $data);
         if ($result) {
-            if ($this->options['length'] > 0) {
-                // 记录缓存队列
-                $queue_file = dirname($filename) . '/__info__.php';
-                $queue      = unserialize(file_get_contents($queue_file));
-                if (!$queue) {
-                    $queue = [];
-                }
-                if (false === array_search($name, $queue)) {
-                    array_push($queue, $name);
-                }
-
-                if (count($queue) > $this->options['length']) {
-                    // 出列
-                    $key = array_shift($queue);
-                    // 删除缓存
-                    $this->unlink($this->filename($key));
-                }
-                file_put_contents($queue_file, serialize($queue));
-            }
             clearstatcache();
             return true;
         } else {