php文件缓存类怎么用

这篇文章主要介绍php文件缓存类怎么用，文中介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们一定要看完！

具体如下：

cache_dir = isset($cache_dir) ? $cache_dir : $this->cache_dir;  $this->cache_time = isset($cache_time) ? $cache_time : $this->cache_time; } public function saveCache ($key, $value){  if (is_dir($this->cache_dir)){   $cache_file = $this->cache_dir . '/xzcache_' . md5($key);   $timedif = @(time() - filemtime($cache_file));   if ($timedif >= $this->cache_time) {    // cached file is too old, create new    $serialized = serialize($value);    if ($f = @fopen($cache_file, 'w')) {     fwrite ($f, $serialized, strlen($serialized));     fclose($f);    }   }   $result = 1;  }else{   echo "Error:dir is not exist.";   $result = 0;  }  return $result; } /**  * @return array   *   0 no cache  *    1 cached  *    2 overdue  */ public function getCache ($key) {  $cache_file = $this->cache_dir . '/xzcache_' . md5($key);  if (is_dir($this->cache_dir) && is_file($cache_file)) {   $timedif = @(time() - filemtime($cache_file));   if ($timedif >= $this->cache_time) {    $result['cached'] = 2;   }else{    // cached file is fresh enough, return cached array    $result['value'] = unserialize(file_get_contents($cache_file));    $result['cached'] = 1;   }  }else {   echo "Error:no cache";   $result['cached'] = 0;  }  return $result; }} //end of class

用法示例如下：

$cache = new XZCache();$key = 'global';$value = $GLOBALS;$cache->saveCache($key, $value);$result = $cache->getCache($key);var_dump($result);

以上是"php文件缓存类怎么用"这篇文章的所有内容，感谢各位的阅读！希望分享的内容对大家有帮助，更多相关知识，欢迎关注行业资讯频道！