Redis----计算好友关注关系

class Friend{public $flag = ""; #存储当前对象的标志信息public $redis = "";#redis对象成员function __construct($name){$this->flag = $name;}function getRd(){#实例化redis对象//实例化redis对象并连接redis服务$this->redis  = new Redis();$this->redis -> connect('192.168.9.38',6379);$this->redis -> select(9);return $this->redis;}function follow($user){#实现关注效果//redis对象->sadd(本人，$user);//$this->getRd()->sadd(本人key，$user);$this->getRd()->sadd("user:{$this->flag}:follow", $user);}function following(){#获得关注全部人员的信息//获得当前作者本人关注的全部对象信息//redis对象->smember(本人)return $this->getRd()->smembers("user:{$this->flag}:follow");}function isfollow($user){#判断是否关注该用户return $this->getRd()->sismember("user:{$this->flag}:follow",$user);}function follow_common($user){#获得共同关注好友信息//当前用户与指定用户共同关注好友信息return $this->getRd()->sinter("user:{$this->flag}:follow","user:{$user}:follow");}}$user1 = new Friend(1);$user1 -> follow(3);$user1 -> follow(4);$user1 -> follow(5);$user1 -> follow(7);$user1 -> follow(9);$user2 = new Friend(2);$user2 -> follow(3);$user2 -> follow(4);$user2 -> follow(5);$user2 -> follow(11);$user2 -> follow(100);$user2 -> follow(130);echo "user1:following:";print_r($user1->following());print_r($user1->isfollow(3));var_dump($user1->isfollow(13));print_r($user1->follow_common(2));