這篇文章主要介紹了php實現的redis緩衝類,結合具體執行個體形式分析了php封裝的針對redis緩衝類定義與使用相關操作技巧,需要的朋友可以參考下
具體如下:
php+redis緩衝類
<?phpclass 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 '<p style="color:red;">'.$str.'</p>'; }}//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?>
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