Getting Error SQLSTATE[HY000] [2002] Connection refused on NAS Synology

Question

I am making an under construction page which is hosted on my Synology NAS.

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Answer 1

I had the same problem:

SQLSTATE[HY000] [2002] Connection refused

when attempting to connect to the MariaDB database running on my Synology NAS from php. Providing just username and password

$conn = new PDO( "mysql:host=$servername;dbname=$dbname", $username, $password );

didn't work, while specifying the port number, a solution found elsewhere, didn't work either:

$conn = new PDO( "mysql:host=$servername;port=3307;dbname=$dbname", $username, $password );

What does work (for me):

$conn = new PDO("mysql:host=$servername:3307;dbname=$database", $login, $password);

The port name is found when opening the MariaDB 10 properties window from the main menu on the Synology NAS. Apparently, the port=3307 specification does not have any effect, but does not give an error message either.