Laravel SQLSTATE[HY000] [1049] Unknown database 'previous_db_name' - php

Question

I have this error when i use php artisan migrate in my Laravel project.
[PDOException]
SQLSTATE[HY000] [1049] Unknown database 'previous_db_name'
this is my database.php file :
'default' => env('DB_CONNECTION', 'mysql'),
'connections' => [
'mysql' => [
'driver' => 'mysql',
'host' => env('DB_HOST', 'localhost'),
'database' => env('DB_DATABASE', 'current_db_name'),
'username' => env('DB_USERNAME', 'root'),
'password' => env('DB_PASSWORD', ''),
'charset' => 'utf8',
'collation' => 'utf8_unicode_ci',
'prefix' => '',
'strict' => false,
],
],
I saw this error in this question and this question but none of them was not helpful.

Answer 1

It clearly mentions that there's no such database named previous_db_name.
From what it seems the database.php file is not where the variable is from.
Check the .env file in your Laravel installation folder to see if that's the database name that you have wrongly specified.

Answer 2

Please run this command:
php artisan config:cache

Answer 3

php artisan cache:clear
AND
restart your server
I had to kill my server and re-run php artisan serve for my project to register the change of my DB_DATABASE name. I kept getting the error even after clearing the cache because I didn't realize this.

Answer 4

In Laravel 5.x You should define the DB Details in two files
.env file in the project folder
.database.php file inside config folder

Answer 5

If you are using PHP artisan serve just restart it. (just in case someone comes searching as I did).

Answer 6

set your database name in .env file too.

Answer 7

I know, it is super late but for people like me, new in laravel and following tutorial from artisansweb. Note that, migrate will not create your database. Rather, it will just create all the tables. Assuming, you have set up your .env file. Now the important part is create the database and users (if you decided to go with custom users) manually. Then, do the php artisan migrate command
hope that helps.

Answer 8

Try this :
<?php
class Config {
private $host = "localhost";
private $db_name = "db_ahp";
private $username = "root";
private $password = "";
public $conn;
public function getConnection() {
$this->conn = null;
try {
$this->conn = new PDO("mysql:host=" . $this->host . ";dbname=" . $this->db_name, $this->username, $this->password);
} catch (PDOException $exception) {
echo "Connection error: " . $exception->getMessage();
}
return $this->conn;
}
}

Answer 9

This might be late but I am just updating in case someone else faces a similar issue. I came across the same error, in my case it happened to be due to a missing database in xampp. i.e I was literally running a migration on an inexisting database in xampp.
Kill your server in case it's running. (Use Ctrl+C on windows.)
Make sure that you created the actual DB in your phpMyAdmin.
Run the following command to clear the cache: php artisan cache:clear
Run php artisan migrate once again.
Everything should be good after this.
Happy coding.