AWS RDS php connection

Question

I can't connect to MySQL RDS instance on AWS through php. It gave me this error:

Warning: mysqli::__construct(): (HY000/2002): A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. in C:\\xampp\\htdocs\\RESULTS\\conne\\New Text Document.php on line 7 Connection failed: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.

Could you please help me to get through. I am new to AWS and stuff. So I would be much thankful if you could describe this issue in detail.

Answer 1

Is it possible that you do not have the ip address of the server hosting your php application whitelisted under your rds security group? Something like this: https://stackoverflow.com/a/21498471/6763406