PHP+redis实现微博的推模型案例分析

user:username:userid:$userid

$conn = connredis();//连接redis
if($f){//如果没有关注过
 $conn->sadd('following:'.$user['userid'],$userid);
 $conn->sadd('follower:'.$userid,$user['userid']);
}else{
 $conn->srem('following:'.$user['userid'],$userid);
 $conn->srem('follower:'.$userid,$user['userid']);
}

//1、保存微博
$conn = connredis();//连接redis
$postid = $conn->incr('global:postid');//生成微博id
//保存微博数据
$conn->hmset('post:postid:'.$postid,['userid'=>$user['userid'],'username'=>$user['username'],'time'=>time(),'content'=>$content]);
//2、推送微博
$fans = $conn->smembers('follower:'.$user['userid']);//获取所有粉丝
$fans[] = $user['userid'];//自己也要推送一份
foreach($fans as $u){
 $conn->lpush('receivepost:'.$u,$postid);
 $conn->ltrim('receivepost:'.$u,0,49);//每个人保存最新微博50条
}

//获取推送的微博id
$conn = connredis();
$postids = $conn->sort('receivepost:'.$user['userid'],['sort'=>'desc']);
//获取微博
$posts = [];
foreach($postids as $postid){
$posts[] = $conn->hmget('post:postid:'.$postid,['userid','username','time','content']);
}
//获取粉丝和关注数
$fansnum = $conn->scard('follower:'.$user['userid']);
$follownum = $conn->scard('following:'.$user['userid']);