PHP

There is no first-party PHP client. The two common Redis clients work against Ruvio: phpredis (the redis extension) and Predis.

Checked against Ruvio with phpredis (PHP 8.3) and Predis 3.7: hMSet/hmset, hGetAll, set with NX/EX, setex, get, expireAt and ping behave as with Redis.

// phpredis
$redis = new Redis();
$redis->connect('127.0.0.1', 6379, 2.0); // 2 s connect timeout
$redis->auth('password');                // when the server has one

// Predis
$client = new Predis\Client('tcp://127.0.0.1:6379?password=password');

Neither client sends CLIENT SETINFO or HELLO when it connects. If your code sends CLIENT SETINFO itself, Ruvio answers with an error and the connection stays open.

With shards above 1 any one port serves every key: a command for a key another shard owns is forwarded there, so a plain client works. A cluster-aware client (RedisCluster in phpredis, 'cluster' => 'redis' in Predis) connects to each shard and saves that hop; keep the keys of one multi-key command in one slot with a hash tag ({user:1}:a, {user:1}:b).

Framework cache and session handlers that use these clients need nothing special:

• CodeIgniter 4: the Redis cache handler writes entries with HMSET, which Ruvio supports (it replies OK, like Redis). Set $redis in app/Config/Cache.php to the Ruvio host, port and password, and use RedisHandler for sessions the same way.
• Laravel: set REDIS_CLIENT=phpredis (or predis), REDIS_HOST, REDIS_PORT and REDIS_PASSWORD; CACHE_STORE=redis and SESSION_DRIVER=redis then use Ruvio.

Commands Ruvio does not support reply with an error; the full list of what is supported is in Redis Compatibility Contract.