Laravel 11 - Fresh Installation 'Undefined Array Key' Errors.
Laravel 11 - Fresh Installation 'Undefined Array Key' Errors.
Learn how to fix the 'Undefined Array Key' error in Laravel 11 after a fresh installation, ensuring a smooth development experience.
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ErrorException : Undefined array key 1
I recently installed a fresh Laravel project and encountered an error when running the php artisan serve command. The error message in the command line interface stated.
ErrorException
Undefined array key 1
at vendor\laravel\framework\src\Illuminate\Foundation\Console\ServeCommand.php
:368
....
....
....
.....
And so on.
Laravel Version Used.
Laravel Framework 11.28.0
PHP Version Used.
PHP 8.2.12
Now, let's demonstrate the issue. Start the Laravel development server using the following command.
Command: php artisan serveAccess the below Url
127.0.0.1:8000And you’ll encounter an 'Undefined Array Key' error in the CLI, which will halt the process.
Next, we'll fix the error. Modify your configuration in the .env file as follows.
From
PHP_CLI_SERVER_WORKERS=4
To
PHP_CLI_SERVER_WORKERS=1
Clear the cache by running the following command.
Command: php artisan optimize:clear
Then, start the server again with
Command: php artisan serveAccess the below Url
127.0.0.1:8000
Why This Configuration Works?
Setting PHP_CLI_SERVER_WORKERS=1 limits the PHP built-in server to a single worker process, preventing the need for forking, which is unsupported on Windows platforms. This configuration helps avoid related errors during local development.
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