php+redis緩衝類

標籤：php+redis緩衝類

php+redis緩衝類

<?php  class redisCache {   /**    * $host : redis伺服器ip    * $port : redis伺服器連接埠    * $lifetime : 快取檔案有效期間,單位為秒    * $cacheid : 快取檔案路徑,包含檔案名稱   */   private $host;   private $port;   private $lifetime;   private $cacheid;   private $data;   public $redis;   /**    * 解構函式,檢查緩衝目錄是否有效,預設賦值   */   function __construct($lifetime=1800) {        //配置        $this->host = "127.0.0.1";        $this->port = "6379";        $redis = new Redis();         $redis->pconnect($this->host,$this->port);         $this->redis=$redis;        $this->cacheid = $this->getcacheid();        $this->lifetime = $lifetime;        $this->data=$redis->hMGet($this->cacheid, array('content','creattime'));        //print_r($this->redis);        //print_r($this->data);   }     /**    * 檢查緩衝是否有效   */   private function isvalid(){       $data=$this->data;       if (!$data['content']) return false;       if (time() - $data['creattime'] > $this->lifetime) return false;       return true;   }   /**    * 寫入緩衝    * $mode == 0 , 以瀏覽器緩衝的方式取得頁面內容   */   public function write($mode=0,$content='') {       switch ($mode) {           case 0:               $content = ob_get_contents();               break;           default:               break;       }       ob_end_flush();       try {            $this->redis->hMset($this->cacheid, array('content'=>$content,'creattime'=>time()));            $this->redis->expireAt($this->cacheid, time() + $this->lifetime);       }       catch (Exception $e) {           $this->error('寫入緩衝失敗!');       }   }   /**    * 載入緩衝    * exit() 載入緩衝後終止原頁面程式的執行,快取無效判定則運行原頁面程式產生緩衝    * ob_start() 開啟瀏覽器緩衝用於在頁面結尾處取得頁面內容   */   public function load() {       if ($this->isvalid()) {           echo $this->data['content'];           exit();       }       else {           ob_start();       }   }   /**    * 清除緩衝   */   public function clean() {       try {           $this->redis->hDel($this->cacheid, array('content','creattime'));       }       catch (Exception $e) {           $this->error('清除緩衝失敗!');       }   }   /**    * 取得快取檔案路徑   */   private function getcacheid() {       return $this->dir.md5($this->geturl()).$this->ext;   }   /**    * 取得當前頁面完整url   */   private function geturl() {       $url = '';       if (isset($_SERVER['REQUEST_URI'])) {           $url = $_SERVER['REQUEST_URI'];       }       else {           $url = $_SERVER['Php_SELF'];           $url .= empty($_SERVER['QUERY_STRING'])?'':'?'.$_SERVER['QUERY_STRING'];       }       return $url;   }   /**    * 輸出錯誤資訊   */   private function error($str) {       echo '<div style="color:red;">'.$str.'</div>';   }}  //用法：// require_once('redisCache.php');// $cache = new redisCache(10); //設定緩衝生存期// if ($_GET['clearCache']) $cache->clean();// else  $cache->load(); //裝載緩衝,緩衝有效則不執行以下頁面代碼// //頁面代碼開始 // //頁面代碼結束// $cache->write(); //首次運行或緩衝到期,產生緩衝   ?>

php+redis緩衝類