SQLSTATE[HY000] [1045] Access denied for user

1. About the error
2. Why do I see this error
3. Solution

#About the error

In a Laravel application the full message reads something like:

SQLSTATE[HY000] [1045] Access denied for user 'forge'@'localhost' (using password: YES)

using password: YES means a password was sent but rejected. using password: NO means no password was sent at all, often a sign the value is empty in your config.

#Why do I see this error

MySQL refused the login. There are only a handful of reasons:

• The username or password is wrong.
• The user exists but is not allowed to connect from this host ('user'@'localhost' versus 'user'@'%').
• The user has no privileges granted on the target database.
• Your application is reading the wrong credentials, an old .env, a cached config, or the wrong environment.

#Solution

First, confirm the credentials in your .env are correct:

DB_CONNECTION=mysql
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=my_app
DB_USERNAME=forge
DB_PASSWORD=secret

Test those exact values directly against MySQL to rule out the application entirely:

mysql -u forge -p -h 127.0.0.1 my_app

If that fails too, the problem is in MySQL, not Laravel. Create or fix the user and grant it access:

CREATE USER 'forge'@'localhost' IDENTIFIED BY 'secret';
GRANT ALL PRIVILEGES ON my_app.* TO 'forge'@'localhost';
FLUSH PRIVILEGES;

Note the host part. A user created as 'forge'@'localhost' cannot connect over TCP to 127.0.0.1, MySQL treats those as different hosts. If your app connects via 127.0.0.1, grant access to 'forge'@'127.0.0.1' (or '%' for any host).

If the direct mysql login works but Laravel still fails, your application is reading stale config. Clear it:

php artisan config:clear

A cached config (php artisan config:cache) freezes whatever values were present at cache time, so re-run it after changing the .env. See environment variables in Laravel for how that loading works.