How to disable deprecated messages in Laravel

The deprecated messages you see are probably due to a mismatch between the PHP version and the Laravel/Carbon versions used in your project.

On newer PHP versions (PHP 8.4.2) there are stricter rules that lead to deprecated messages when older libraries are used.

There are two ways to fix the problem: you can update dependencies or you can just disable the messages.

In the first case (which seems smarter to me) you can act like this

Case 1) Update Dependencies

First make a backup of your project (just to be safe).

Edit your composer.json

"require": {
    "php": "^8.1",                // or as you said 8.4.2
    "laravel/framework": "^10.0", // always and only the numeric version preceded by a "^" and nothing else more (Laravel Framework 10.48.25 = 10.48.25)
    "nesbot/carbon": "^2.0"       // use a recent version of Carbon
}

then run a

composer update

Case 2) Act on PHP

In php.ini check the line that contains error_reporting and modify it as follows

error_reporting = E_ALL & ~E_DEPRECATED

In Laravel you can suppress errors programmatically editing the file bootstrap/app.php, better then acting on artisan file

// be sure to add the following line before the $app is returned
error_reporting(E_ALL & ~E_DEPRECATED & ~E_USER_DEPRECATED);

If you want to suppress errors in development environment edit your

app/Providers/AppServiceProvider.php

and put this line in the boot method

if (app()->environment('local')) {
    error_reporting(E_ALL & ~E_DEPRECATED & ~E_USER_DEPRECATED);
}

If you want to intervene on the Carbon library instead, you can configure Carbon to silence deprecation warnings like this, always inserting in the boot function in app/Providers/AppServiceProvider.php the following lines

\Carbon\Carbon::setPhpVersion(PHP_VERSION_ID);
\Carbon\Carbon::disableDeprecationWarnings();

It's up to you.

In any case, doing this should clean up your project and stop seeing log errors.

You can disable deprecation warnings from PHP to fix this issue. As @ref2 mentioned you can put this in your php.ini, or in your file using

error_reporting(E_ERROR | E_WARNING | E_PARSE | E_NOTICE);

or

error_reporting(E_ALL ^ E_DEPRECATED);

Source: https://stackoverflow.com/a/2803783/22557063

Since this is a Laravel app, I would recommend placing this in your AppServiceProvider (See docs).

If that doesn't work, you might consider placing it at the beginning of the artisan file, e.g. here. That should solve the deprecation message being displayed when running artisan commands

If you want to disable errors, warnings and deprecation notices from displaying on your rendered webpage only and in a non-intrusive way, simply add the following code to the very first line of your 'public/index.php' file:

<?php
    error_reporting(E_ALL & ~E_DEPRECATED & ~E_USER_DEPRECATED);

    // continue with the content of your index.php file

You will still see the notices on the console when you use artisan commands but not on your webpage. Very useful if you want your website to be presentable as soon as possible without those annoying notices.

I will not advise to disable these notices from anywhere outside your local Laravel application and especially not in your php.ini file because you won't be able to debug errors that arise when building a new Laravel application. Usually, these deprecation notices arise when your want to re-install an old Laravel application while you have a newer version of PHP and if they are not related to any PHP packages you use in the actual application, then it is not an issue.