PHP Notice: Constant FLD_EMAIL already defined laravel - php

Question

I have created a file called db-constant.php in conifg directory in laravel , this file contains my constants,then i added this line require_once 'db-constants.php'; in app.php ,the problem is where i type php artisan cache:clear or any command this message will appear
PHP Notice: Constant FLD_EMAIL already defined in /var/www/html/test/config/db-constants.php on line 1
how can i fix this ?

Answer 1

If you use Laravel, you don't have to use require_once or it's counterparts. composer's autoloading is used for everything, and configuration files are loaded automatically. What you have to do is read the docs about configuration, place the file in config/ directory and return an array with configuration values.
Now, what it seems (to me at) is that for some odd reason you want to use constants instead of Laravel's mechanism for accessing configuration values. In that case, you:
1.) DON'T place anything in config/ directory
2.) DON'T manually require_once anything
3.) DO use Composer's autoloading capabilities
How to load a file with constants in Laravel
1.) create app/MyConstants directory.
2.) create your file, let's call it constants.php. Path is:
app/MyConstants/constants.php
3.) Add your define code
4.) Open composer.json
5.) Find "autoload"
6.) Look for "files" under "autoload". If it doesn't exist, create it.
7.) Add the list of files you want to include automatically
Your "autoload" in composer.json should look like this:
"autoload": {
"files": ["app/MyConstants/constants.php"]
}
In terminal, type composer du or composer dump-autoload. It will re-create autoloader and automatically include the file with your constants.
Remove bootstrap/cache so you can use artisan again.
Now you can:
1.) Have a place where you can define constants
2.) Avoid manually requiring files
Personally, I don't see a reason for this, but then again - I'm just a human, I've no clue about anything in the grand scheme :)

Answer 2

You need to read this docs first https://laravel.com/docs/5.4/configuration. As well as the rest of the documentation for Laravel. How to use config files:
Create your own file db-constant.php in config directory.
Fill it as you need. For example
return [
'FLD_EMAIL' => 'your-field-here',
];
Use it wherever you need
$email = config('db-constant.FLD_EMAIL');
It's all.