<?php /*从平台获取数据库名*/ $dbname = ""; /*从环境变量里取host,port,user,pwd*/ $host = ''; $port = ''; $user = ''; $pwd = ''; try {     /*建立连接后，在进行集合操作前，需要先进行auth验证*/     $redis = new Redis();     $ret = $redis->connect($host, $port);     if ($ret === false) {     die($redis->getLastError());     }     $ret = $redis->auth($user . "-" . $pwd . "-" . $dbname);     if ($ret === false) {     die($redis->getLastError());     }     /*接下来就可以对该库进行操作了，具体操作方法请参考phpredis官方文档*/     $redis->flushdb();     $ret = $redis->set("key", "value");     if ($ret === false) {     die($redis->getLastError());     } else {     echo "OK".$redis->get("key");     } } catch (RedisException $e) {     die("Uncaught exception " . $e->getMessage()); } ?>