PHP实战之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); //输出数据复制代码

$redis->connect('127.0.0.1', 6379);$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);复制代码

//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();复制代码

//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
	]);
}复制代码

$redis->connect('127.0.0.1', 6379);$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}。 ---- ";复制代码

$redis->connect('127.0.0.1', 6379);$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);复制代码

/**
 * 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>';
}复制代码

$strKey = 'Test_bihu_age';$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，则整个事务会失败复制代码