How to set constants in Laravel (two methods)

Laravel is a popular PHP framework that can enhance the readability and maintainability of applications by defining constants. In Laravel, we can use the config function or the Env class to define constants. This article will show you how to set constants in Laravel.

1. Use the config function to set constants

Laravel's config function can easily access the application's configuration file. We can define our own constants by creating a new PHP file in the config directory.

Here is an example:

1. Create a new file constants.php in the config directory.
2. Declare our constants in constants.php:

return [
    'SITE_NAME' => 'My Site',
    'EMAIL_ADDRESS' => 'info@mysite.com',
    'PHONE_NUMBER' => '+1 555-555-5555'
];

We can use the following code to access these constants in the application:

$config_value = config('constants.SITE_NAME');

2. Use Env class sets constants

Laravel's Env class provides a general way to set environment variables. We can use this class to set up constants, database connections, and more.

Here is an example:

1. First, open the .env file and add our constants:

SITE_NAME="My Site"
EMAIL_ADDRESS="info@mysite.com"
PHONE_NUMBER="+1 555-555-5555"

2. Use in the application The following code to access these constants:

$site_name = env('SITE_NAME');

If you need to set global constants in your Laravel application, you can add these constants to the boot method in the AppServiceProvider.

namespace App\Providers;

use Illuminate\Support\ServiceProvider;

class AppServiceProvider extends ServiceProvider
{
    public function boot()
    {
        define('SITE_NAME', 'My Site');
        define('EMAIL_ADDRESS', 'info@mysite.com');
        define('PHONE_NUMBER', '+1 555-555-5555');
    }

    public function register()
    {
        // Register any application services
    }
}

Summary

Laravel makes it very easy to set constants in your application. By defining constants, we can improve the readability and maintainability of our code. In this article, we introduced two ways to set constants in Laravel: using the config function and the Env class. If you need to set constants throughout your application, add them to the AppServiceProvider.

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