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php 实现文件缓存函数代码

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Release： 2016-06-13 10:39:22
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  2.  /**
  3.  * 读取或设置缓存
  4.  *
  5.  * @access  public
  6.  * @param   string  $name   缓存名称
  7.  * @param   mixed   $value  缓存内容, null删除缓存
  8.  * @param   string  $path   缓存路径
  9.  * @return  mixed
  10.  */
  11.  function cache($name, $value = , $path = )
  12.  {
  13.      return false;   //调试阶段, 不进行缓存
  14.      $path = empty($path) ? ROOT_PATH . /Runtime/Data/ : $path;
  15.      $file = $path . $name . .php;
  17.      if (empty($value)) {
  18.          //缓存不存在
  19.          if (!is_file($file)) {
  20.              return false;
  21.          }
  23.          // 删除缓存
  24.          if (is_null($value)) {
  25.              unlink($file);
  26.              return true;
  27.          }
  29.          $data = include $file;
  30.          return $data;
  31.      }
  33.      $value = var_export($value, true);
  34.      $value = "";
  35.      return file_put_contents($file, $value);
  36. }
  38. //函数调用
  39. cache(name, array(a, b, c)); //写入缓存 name为缓存名称, 后面那个数组是缓存的内容
  40. cache(name); //读取缓存
  41. cache(name, null); //删除缓存
  42. ?>

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