To update Laravel 5.6 to the latest version of Laravel, you can follow these steps:

Update your composer.json file to use the latest version of Laravel. You can do this by changing the "laravel/framework" version constraint in your composer.json file to "^8.0".

Run the following command in your terminal to update Laravel:

composer update

This command will download and install the latest version of Laravel and its dependencies.
Once the update is complete, you may need to update your code to be compatible with the latest version of Laravel. You can refer to the Laravel upgrade guide for information on any changes that may be required.

After making any necessary changes to your code, you can run the following command to clear your application cache:

php artisan cache:clear

This command will clear any cached files that may be causing issues with your updated application.
Finally, you can test your application to ensure it is functioning as expected with the latest version of Laravel.

It is important to note that updating Laravel can introduce breaking changes in your code, so it's recommended to test your application thoroughly before deploying to a production environment.
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@cloudways

You need to be updated all the time. Since Laravel is going to released 5.8 soon, on that stage you are planning for updating laravel 5.6...!

You could just create a Laravel 5.6 app locally (on your pc) with a remote git repository to push it to. On your server with Laravel 5.5 installed, you simply pull from the remote repository, followed by a ‘composer update’ for your application in the SSH terminal. That’s a workaround.

Since Laravel 5.5 is officially released, I would like to see it available on Cloudways