redis常见使用场景下PHP实现

 

基于redis字符串string类型的简单缓存实现
 
<?php //简单字符串缓存 $redis = new \Redis(); $redis->connect('127.0.0.1',6379); //缓存数据 $redis->set('cache_key',json_encode(['data'=>'这是缓存数据'])); //获取缓存数据 $data = $redis->get('cache_key');
print_r(json_decode($data,true));
 
    基于redis列表list类型的简单队列实现
 
<?php //利用列表list实现简单队列 $redis = new \Redis(); $redis->connect('localhost',6379); //进队列  $redis->rpush('queue_name',json_encode(['user_id'=>5]));
 $redis->rpush('queue_name',json_encode(['user_id'=>6]));  $redis->rpush('queue_name',json_encode(['user_id'=>7]));  echo "数据进队列完成
"; //可查看队列 $res = $redis->lrange('queue_name',0,1000);
print_r($res); //出队列  $redis->lpop('queue_name'); //查看队列  $res = $redis->lrange('queue_name',0,1000);
print_r($res);
 
    基于redis事务的乐观锁实现
 
<?php //实现乐观锁机制 $redis = new \Redis();
 $redis->connect('localhost',6379); //监视count的值  $redis->watch('count'); //开启事务  $redis->multi(); //操作count $redis->set('count',time()); //模拟并发下其他进程对count的操作 //redis-cli 执行
 $redis->set('count','is simulate'); sleep(10); //提交事务  $res = $redis->exec(); if($res){
    echo 'sucesss'; return;
}else{
    echo 'fail';
}
 
    基于redis的发布订阅实现
 
 
    发布publish.php
 
<?php //发布  $redis = new \Redis(); $redis->connect('localhost',6379); $redis->publish('msg','来自xxx频道的消息推送');
echo '消息推送成功'; $redis->close();
 
    订阅subscribe.php
 
<?php //订阅  //ini_set('default_socket_timeout',-1);  $redis = new \Redis();
 $redis->pconnect('localhost',6379); //订阅 echo "订阅频道等待消息推送
"; $redis->subscribe(['msg'],'callfun'); //msg 是频道名 //回调 function callfun($redis,$channel,$msg){  print_r(['redis'=>$redis, 'channel'=>$channel, 'msg'=>$msg]
);
}