"Access denied for user, using password: yes" Laravel 8 Heroku - php

Question

Here is the config/database.php file that I modified using this tutorial. It says that I need to attach the $DATABASE_URL=parse_url("mysql://####"); code block above the said php page. (the tutorial is using postgreSQL, while my system needs to use MySQL).
// attached $DATABASE_URL=parse_url("mysql://####") on the topmost part of the page
'mysql' => [
'driver' => 'mysql',
'url' => env('DATABASE_URL'),
'host' => $DATABASE_URL['host'], // edited this line
'port' => $DATABASE_URL['port'], // edited this line
'database' => ltrim($DATABASE_URL['path'], '/'), // edited this line
'username' => $DATABASE_URL['user'], // edited this line
'password' => $DATABASE_URL['pass'], // edited this line
'unix_socket' => env('DB_SOCKET', ''),
'charset' => 'utf8mb4',
'collation' => 'utf8mb4_unicode_ci',
'prefix' => '',
'prefix_indexes' => true,
'strict' => true,
'engine' => null,
'options' => extension_loaded('pdo_mysql') ? array_filter([
PDO::MYSQL_ATTR_SSL_CA => env('MYSQL_ATTR_SSL_CA'),
]) : [],
],
below is the original mysql code
// 'mysql' => [
// 'driver' => 'mysql',
// 'url' => env('DATABASE_URL'),
// 'host' => env('DB_HOST', '127.0.0.1'),
// 'port' => env('DB_PORT', '3306'),
// 'database' => env('DB_DATABASE', 'forge'),
// 'username' => env('DB_USERNAME', 'forge'),
// 'password' => env('DB_PASSWORD', ''),
// 'unix_socket' => env('DB_SOCKET', ''),
// 'charset' => 'utf8mb4',
// 'collation' => 'utf8mb4_unicode_ci',
// 'prefix' => '',
// 'prefix_indexes' => true,
// 'strict' => true,
// 'engine' => null,
// 'options' => extension_loaded('pdo_mysql') ? array_filter([
// PDO::MYSQL_ATTR_SSL_CA => env('MYSQL_ATTR_SSL_CA'),
// ]) : [],
// ],
error ouput when running the system with the said problem
SQLSTATE[HY000] [1045] Access denied for user '{{redacted username}}'#'{{redacted ip address}}' (using password: YES) (SQL: select * from video_links where home_video = true and video_links.deleted_at is null limit 1)
Another problem I encounter while running the migration command in the Heroku CLI is this:
PHP Warning: Undefined array key "port" in /app/config/database.php on line 51
It seems like the $DATABASE_URL=parse_url("mysql://####") is not fetching the port value in its array.
How should I approach this?

Answer 1

You can leave config/database.php unchanged.
And add an ENV var DATABASE_URL:
In the settings or via CLI:
heroku config:set DATABASE_URL=YOUR_URL