In Laravel 9, when executing redis::set($this->rules_update_key, carbon::now()); Differences in Predis/Predis packages

1. In Laravel 9, after executing redis::set($this->rules_update_key, carbon::now()); and found that the written value is Object. as shown in Figure 1

Figure 1

2. But in the test environment, the written value is a datetime string. Its value: 2024-01-30 06:00:00. as shown in Figure 2

Figure 2

3. The final comparison found that the root of the difference is that in the .env file, there is one more line of configuration in the test environment

REDIS_CLIENT=predis