Sorted:

What is the function of the “substr” function in PHP?

How to use the substr function in PHP?

What are the characteristics of multi-threading in Java?

What is the usage of the setnx command in Redis?

How can I capitalize the first letter of a name in Python?

How can we determine if keepalived is functioning properly?

What is the difference between Prometheus and Grafana?

How to check the number of connections in SQL Server?

What is the method for converting a Java enum?

How to achieve high availability with HAProxy?