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php Connect to redis
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How to connect php to redis

May 30, 2023 pm 05:29 PM
php redis

php Connect to redis

   $redis = new Redis();
   $redis->connect('127.0.0.1', 6379);
   echo "Connection to server successfully";
   //查看服务是否运行
   echo "Server is running: " . $redis->ping();
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1. Set key / value Check whether key exists Delete key Modify key

   $redis->set('db',"redis"); // 设置键值
   $redis->set('db',"redis1111"); // 覆盖旧的键值
   $c = $redis->exists('db'); // 检查键值是否存在, 返回的是 1  。不错在返回的是0
   $redis->del('db');// 删除键值
   $a =  $redis->get('db');//删除键值之后返回的 false
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2. Set expiration time by seconds/set specific expiration time/remove Expiration time/Check how much time is left to expire

   $redis->set('db',"redis"); // 设置键值
   $redis->expire('db',10);  # 设置1秒后过期
   $time = time();
   $redis->set('cache','www.google.com');
   $redis->expireat('cache',$time); # 设置具体的日期时间 10 位时间戳
   $redis->persist('cache'); // 移除该键值的过期的时间
   $redis->ttl('cache');// 检查该键值还剩余多少时间才过期, 没有过期时间的话 返回 -1 有过期时间返回 数字 单位 秒
   $redis->pttl('cache');// 以毫秒为单位返回
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3. Find out the qualified keys values ​​in redis/Get all keys

   $redis->set('db',"redis"); // 设置键值
   $redis->set('cache','www.google.com');// 设置键值
   $redis->set('ad','www.google.com');// 设置键值
   $redis->set('adb','www.google.com');// 设置键值
   $a = $redis->keys('*d*'); // 类似于sql  的like。 在这里可以是  *d*,*d,d*
   $allKeys = $redis->keys('*'); // 获取所有的key
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4. Migration of key values, From a Database migration to another database,If it already exists, the migration will not be successful

   $redis->select(0); // 选择数据redis 数据库 0
   $redis->set('db2','test1');//设置键值对
   $redis->move('db2',1); // 将数据0 的键值 db1 迁移到  数据库  1 中
   $b = $redis->get('db2'); 
   $redis->select(1); // 链接数据库 1
   $a = $redis->get('db1'); // 获取数据库 1 里的 键值对的值, 这个时候是获取的到的,
   //如果数据库1 已经存在了键值,那么会迁移失败,遵循 原子性, 保持原先的状态
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5. Randomly return the value of a key/modify the name of the key (rename and renamex are similar, renamex An error will be reported when modifying a non-existent key)

   $redis->set('a',"1886..."); 
   $redis->set('b',"2886...");
   $redis->set('c',"3886...");
   $redis->set('d',"4886...");
   $redis->rename('a','aacd'); // 将 key   a  修改成  aacd , key  a 则不存在了
   $c = $redis->get('a');
   $d = $redis->get('aacd');
   $b = $redis->randomkey(); // 随机返回一个 key
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6. Determine the type of value corresponding to the key

//none(key不存在) int(0)
    //string(字符串) int(1)
    //list(列表) int(3)
    //set(集合) int(2)
    //zset(有序集) int(4)
    //hash(哈希表) int(5)
   $redis->set('a','adasdasdasdasdd');
   $a = $redis->TYPE('a'); // 返回的是 1 数字 , 自己要核对上面的注释,才可以知道是哪个类型
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