Php + redis Cache

Php + redis Cache

Php + redis Cache Class redisCache { /** * $ Host: ip address of the redis server * $ Port: redis server port * $ Lifetime: cache file validity period, in seconds * $ Cacheid: cache file path, including file name */ Private $ host; Private $ port; Private $ lifetime; Private $ cacheid; Private $ data; Public $ redis; /** * Destructor: checks whether the cache directory is valid. the default value is assigned. */ Function _ construct ($ lifetime = 1800 ){ // Configure $ 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-> HMET ($ this-> cacheid, array ('content', 'creattime ')); // Print_r ($ this-> redis ); // Print_r ($ this-> data ); } /** * Check whether the cache is valid */ Private function isvalid (){ $ Data = $ this-> data; If (! $ Data ['content']) return false; If (time ()-$ data ['creattime']> $ this-> lifetime) return false; Return true; } /** * Write cache * $ Mode = 0. the page content is obtained in browser cache. */ 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 ('write cache failed! '); } } /** * Load cache * Exit () stops the execution of the original page program after loading the cache. if the cache is invalid, run the original page program to generate the cache. * Ob_start () enables browser caching to retrieve page content at the end of the page */ Public function load (){ If ($ this-> isvalid ()){ Echo $ this-> data ['content']; Exit (); } Else { Ob_start (); } } /** * Clear cache */ Public function clean (){ Try { $ This-> redis-> hDel ($ this-> cacheid, array ('content', 'creattime ')); } Catch (Exception $ e ){ $ This-> error ('cache cleanup failed! '); } } /** * Obtain the cache file path */ Private function getcacheid (){ Return $ this-> dir. md5 ($ this-> geturl (). $ this-> ext; } /** * Obtain the complete url of the current page. */ 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; } /** * Output error message */ Private function error ($ str ){ Echo' '. $ Str .' '; } } // Usage: // Require_once ('rediscache. php '); // $ Cache = new redisCache (10); // sets the cache lifetime. // If ($ _ GET ['Your ache']) $ cache-> clean (); // Else $ cache-> load (); // load the cache. if the cache is valid, the following page code is not executed. /// Page code starts /// The page code ends. // $ Cache-> write (); // The cache is generated when the first operation or cache expires. ?>

Php, redis

This topic was moved by Beckham