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查看 php redis 扩展版本

php --ri redis

Redis Support => enabled
Redis Version => 6.1.0
Redis Sentinel Version => 1.0
Available serializers => php, json

安装对应版本的 redis-ide-helper 扩展

Redis Version => 6.1.0

composer require --dev sanzhangshitou/redis-ide-helper:~6.1.0

Redis Version => 6.2.0

composer require --dev sanzhangshitou/redis-ide-helper:~6.2.0

Redis Version => 6.3.0

composer require --dev sanzhangshitou/redis-ide-helper:~6.3.0

/** @var \Redis $redis */
$redis = new \Redis();
$redis->connect(host: 'localhost', port: 6699);
$auth = $redis->auth('redis123456');
if (!$auth) {
    exit('Redis 密码认证失败');
}
$redis->select(1);
$redis->set('key', mt_rand(100000, 999999));
$res = $redis->get('key');
var_dump($res);