PHP使用Redis常见7种使用场景

$redis->connect('127.0.0.1', 6379);
$strCacheKey = 'Test_bihu';
//SET 应用
$arrCacheData = [
 'name' => 'job',
 'sex' => '男',
 'age' => '30'
];
$redis->set($strCacheKey, json_encode($arrCacheData));
$redis->expire($strCacheKey, 30); # 设置30秒后过期
$json_data = $redis->get($strCacheKey);
$data = json_decode($json_data);
print_r($data->age); //输出数据
//HSET 应用
$arrWebSite = [
 'google' => [
 'google.com',
 'google.com.hk'
 ],
];
$redis->hSet($strCacheKey, 'google', json_encode($arrWebSite['google']));
$json_data = $redis->hGet($strCacheKey, 'google');
$data = json_decode($json_data);
print_r($data); //输出数据

$redis->connect('127.0.0.1', 6379);
$strQueueName = 'Test_bihu_queue';
//进队列
$redis->rpush($strQueueName, json_encode(['uid' => 1,'name' => 'Job']));
$redis->rpush($strQueueName, json_encode(['uid' => 2,'name' => 'Tom']));
$redis->rpush($strQueueName, json_encode(['uid' => 3,'name' => 'John']));
echo "---- 进队列成功 ---- <br /><br />";
//查看队列
$strCount = $redis->lrange($strQueueName, 0, -1);
echo "当前队列数据为： <br />";
print_r($strCount);
//出队列
$redis->lpop($strQueueName);
echo "<br /><br /> ---- 出队列成功 ---- <br /><br />";
//查看队列
$strCount = $redis->lrange($strQueueName, 0, -1);
echo "当前队列数据为： <br />";
print_r($strCount);

//以下是 pub.php 文件的内容 cli下运行
ini_set('default_socket_timeout', -1);
$redis->connect('127.0.0.1', 6379);
$strChannel = 'Test_bihu_channel';
//发布
$redis->publish($strChannel, "来自{$strChannel}频道的推送");
echo "---- {$strChannel} ---- 频道消息推送成功～ <br/>";
$redis->close();
//以下是 sub.php 文件内容 cli下运行
ini_set('default_socket_timeout', -1);
$redis->connect('127.0.0.1', 6379);
$strChannel = 'Test_bihu_channel';
//订阅
echo "---- 订阅{$strChannel}这个频道，等待消息推送...---- <br/><br/>";
$redis->subscribe([$strChannel], 'callBackFun');
function callBackFun($redis, $channel, $msg)
{
 print_r([
 'redis' => $redis,
 'channel' => $channel,
 'msg' => $msg
 ]);
}

$redis->connect('127.0.0.1', 6379);
$strKey = 'Test_bihu_comments';
//设置初始值
$redis->set($strKey, 0);
$redis->INCR($strKey); //+1
$redis->INCR($strKey); //+1
$redis->INCR($strKey); //+1
$strNowCount = $redis->get($strKey);
echo "---- 当前数量为{$strNowCount}。 ---- ";

$redis->connect('127.0.0.1', 6379);
$strKey = 'Test_bihu_score';
//存储数据
$redis->zadd($strKey, '50', json_encode(['name' => 'Tom']));
$redis->zadd($strKey, '70', json_encode(['name' => 'John']));
$redis->zadd($strKey, '90', json_encode(['name' => 'Jerry']));
$redis->zadd($strKey, '30', json_encode(['name' => 'Job']));
$redis->zadd($strKey, '100', json_encode(['name' => 'LiMing']));
$dataOne = $redis->ZREVRANGE($strKey, 0, -1, true);
echo "---- {$strKey}由大到小的排序 ---- <br /><br />";
print_r($dataOne);
$dataTwo = $redis->ZRANGE($strKey, 0, -1, true);
echo "<br /><br />---- {$strKey}由小到大的排序 ---- <br /><br />";
print_r($dataTwo);

/**
 * 获取锁
 * @param String $key 锁标识
 * @param Int $expire 锁过期时间
 * @return Boolean
 */
public function lock($key = '', $expire = 5) {
 $is_lock = $this->_redis->setnx($key, time()+$expire);
 //不能获取锁
 if(!$is_lock){
 //判断锁是否过期
 $lock_time = $this->_redis->get($key);
 //锁已过期，删除锁，重新获取
 if (time() > $lock_time) {
 unlock($key);
 $is_lock = $this->_redis->setnx($key, time() + $expire);
 }
 }
 return $is_lock? true : false;
}
/**
 * 释放锁
 * @param String $key 锁标识
 * @return Boolean
 */
public function unlock($key = ''){
 return $this->_redis->del($key);
}
// 定义锁标识
$key = 'Test_bihu_lock';
// 获取锁
$is_lock = lock($key, 10);
if ($is_lock) {
 echo 'get lock success<br>';
 echo 'do sth..<br>';
 sleep(5);
 echo 'success<br>';
 unlock($key);
} else { //获取锁失败
 echo 'request too frequently<br>';
}

$strKey = 'Test_bihu_age';
$redis->set($strKey,10);
$age = $redis->get($strKey);
echo "---- Current Age:{$age} ---- <br/><br/>";
$redis->watch($strKey);
// 开启事务
$redis->multi();
//在这个时候新开了一个新会话执行
$redis->set($strKey,30); //新会话
echo "---- Current Age:{$age} ---- <br/><br/>"; //30
$redis->set($strKey,20);
$redis->exec();
$age = $redis->get($strKey);
echo "---- Current Age:{$age} ---- <br/><br/>"; //30
//当exec时候如果监视的key从调用watch后发生过变化，则整个事务会失败