Where should I keep my constants in lumen? - php

Question

I am writing a web service using Lumen and need to store some constants, specifically error values, but also other configuration parameters. Where would it be most appropriate to put these?

Answer 1

Here is how I did it.
I made a const.php file within bootstrap folder where I have defined some error codes.
<?php
define('VALIDATION_EXCEPTION',422);
I included the const.php file in app.php using require_once.
<?php
require_once __DIR__.'./const.php';
Now I can call VALIDATION_EXCEPTION from anywhere. for instance.
$router->get('/test',function(){
return VALIDATION_EXCEPTION;
});
That's it!

Answer 2

Create a file constants.php inside config/ and put your settings in an array:
<?php
return [
'CONTACT_NAME' => 'Admin'
];
Then in your controllers you can get the value by using Config Facade:
echo Config::get('constants.CONTACT_NAME');

Answer 3

This solution was from this link
.env is intended for per-environment configuration and sensitive credentials.
You can maintain a config with this type of data. There is no default config for Lumen like there is for Laravel, so you need to add the required config directory, and tell Lumen to use it:
$ mkdir config
$ touch config/app.php
In the app.php file, you can return an array with the config:
// config/app.php
<?php
return [
'order_by' => 'whatever'
// and so on
];
Then tell Lumen to load the config from app.php inside bootstrap/app.php, by adding (after $app has been initialised):
$app->configure('app');
Finally, you can use the config() helper method to get the configuration:
config('app.order_by') // whatever

Answer 4

1.Create New Directory Helpers under App Directory.
2.Create New php file ErrorCodes.php under Helpers directory
3.Put your constants in that file
<?php define('VALIDATION_ERROR', 'E001'); define('EXCEPTION', 'E002'); define('CUSTOM','E003'); ?>
4.Add this ErrorCodes file under autoload section of composer.json
"files" : [
"app/Helpers/ErrorCodes.php"
]
5.Run composer autoload command in your artisan terminal
composer dumpautoload
And you are all set to use your constants anywhere in your lumen App.

Answer 5

Seems like you are talking about two different things here. For configuration values the only correct location is the .env file (as already mentioned in the comments).
https://lumen.laravel.com/docs/5.5/configuration#environment-configuration
This is where you put all environmental specific configuration values (e.g. API keys, debug mode, etc. etc.). If you have a strong wish for it you can put the env-variables into constants during the bootstrap process e.g.:
define('APP_DEBUG',env('APP_DEBUG', true));
For defining simple constants there should be multiple possibiilties.
You could do this either during the bootstrap process or define a class (e.g. a model):
class Error
{
const FATAL = 1;
const WARNING = 2;
}
use Error;
....
Error::FATAL;
...