i In Laravel 5.5, the Request has() method returns true for empty strings and null. If you would like to preserve the old behavior of the has() method, you may use the new filled() method instead.

i In Laravel 5.5, the Request only() method returns attributes that are actually present in the request payload. If you would like to preserve the old behavior of the only() method, you may use the all() method instead.

i In Laravel 5.5, the request() helper will no longer retrieve nested keys. You may instead use the input() method to retrieve nested keys, for example: request()->input('nested.key')

❌ Shift could not upgrade the following project files since they differed from the default Laravel version. You will need to compare these project files against the default Laravel 5.5 versions and merge any changes:

• phpunit.xml
• public/index.php
• tests/Feature/ExampleTest.php

❌ Shift could not upgrade the following configuration files since they differed from the default Laravel version. You will need to compare these configuration files against the Laravel 5.5 configuration files and merge any changes:

• config/services.php

i Laravel 5.5 now sets the session cookie name using the APP_NAME. If you rely on the previous laravel_session value, you may set this using the new SESSION_COOKIE environment variable. Review the cookie key in config/session.php for more details.

❌ Laravel 5.5 requires PHP 7. You have a modified dependency for PHP in your composer.json. Ensure it meets the new version requirement of >=7.0.0.

i Laravel 5.5 changed the default format for HTTP exception responses. This may affect your application if you rely upon default JSON responses. Review the Exception Format section of the Upgrade Guide for more detail.

i Laravel 5.5 removed bootstrap/autoload.php and uses the Composer vendor/autoload.php instead. If you were referencing bootstrap/autoload.php directly, you should upgrade your application accordingly.

i If you are using the database cache driver, you should run php artisan cache:clear when running your upgraded Laravel 5.5 application for the first time.

i Laravel 5.5 uses package auto-discovery to make it easier to install and enable packages.

This may require you to update Composer. You may do so by running composer self-update. Review the Composer documentation for more details.

In addition, you may also unregister the providers and aliases for any packages using auto-discovery from your config/app.php.