ERROR: SQLSTATE[HY000] [2002] No connection could be made because the target machine actively refused it

An error suddenly occurred while I was debugging my code. It has this series of errors regarding the connection to database.

ERROR: SQLSTATE[HY000] [2002] No connection could be made because the target machine actively refused it.
( ! ) Fatal error: Uncaught exception 'PDOException' with message ' in C:wampwwwwebmainusers.php on line 15
( ! ) PDOException: SQLSTATE[HY000] [2002] No connection could be made because the target machine actively refused it. in C:wampwwwwebmainusers.php on line 15

this is the code of where the error is pointing

function __construct()
        {
            $this->con = new PDO("mysql:host=".$this->host.";dbname=".$this->db,$this->user,$this->pass);
        }

I don’t know what to do since I do not usually get problems like this so I haven’t studied much about WAMP. Thank You for your help.

Answer

If the WAMP icon is Orange then one of the services has not started.

In your case it looks like MySQL has not started as you are getting the message that indicates there is no server running and therefore listening for requests.

Look at the mysql log and if that tells you nothing look at the Windows event log, in the Windows -> Applications section. Error messages in there are pretty good at identifying the cause of MySQL failing to start.

Sometimes this is caused by a my.ini file from another install being picked up by WAMPServers MySQL, normally in the windows or windowssystem32 folders. Do a search for ‘my.ini’ and ‘my.cnf’ and if you find one of these anywhere outside of the wamp…. folder structure then delete it, or at least rename it so it wont be found. Then restart the MySQL service.