PDO Unknown database

Getting an error stating that the database is unknown for my user even though it exists and is spelled correctly. I have granted them all permissions on the db, I can access it through the mysql command line in my server and I can access it through mysql workbench but when trying to access it with pdo in my api.

I checked the User, Host from mysql.user and it shows that the user has % and localhost. I commented out bind-address in mysqld.cnf and created my user like so.

CREATE USER 'user'@'localhost' IDENTIFIED BY 'myPassword';
CREATE USER 'user'@'%' IDENTIFIED BY 'myPassword';

My PDO Connection

class Database{
    private $host = "";
    private $db_name = "casinoCheckList";
    private $username = "user";
    private $password = "myPassword";
    public $conn;

    public function getConnection(){

        $this->conn = null;
            $this->conn = new PDO("mysql:host=" . $this->host . ";dbname=" . $this->db_name, $this->username, $this->password);
            $this->conn->exec("set names utf8");
        }catch(PDOException $exception){
            echo "Connection error: " . $exception->getMessage();

        return $this->conn;

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Andrew Moore
DigitalOcean Employee
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November 25, 2019
Accepted Answer


I would speculate that the issue you had was based on the transport method being used.

GRANT ALL PRIVILEGES ON casinoChecklist.* TO 'user'@'localhost'

Notice your use of ‘localhost’. What we tend to experience is the client connection using the unix socket and avoiding the TCP/IP routing. Your PHP script uses the loopback address and it might have manifested in the error you experienced.

If you add a user where the host is wild carded or explicitly using the lo interface ( you may not have experienced this issue.

Something to watch if you’re troubleshooting connection challenges in the future.


Bobby Iliev
Site Moderator
Site Moderator badge
November 25, 2019


What I could suggest is checking if the casinoCheckList database actually exists:


If the database is not there you could create it with:

CREATE DATABASE casinoCheckList;

If this is not the case I could suggest sharing the exact error that you are getting here so I could try to advise you further.

Regards, Bobby

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