Upgrading Laravel requires a bit more steps then just updating composer, however they aren't too complicated. Here is the guide along with all the steps:
To answer the question, for composer you would make the following changes (from the documentation):
You should update the following dependencies in your application's composer.jsonfile:
laravel/framework to ^9.0
nunomaduro/collision to ^6.1
In addition, please replace facade/ignition with "spatie/laravel-ignition": "^1.0" in your application's composer.json file.
Furthermore, the following first-party packages have received new major releases to support Laravel 9.x. If applicable, you should read their individual upgrade guides before upgrading:
Finally, examine any other third-party packages consumed by your application and verify you are using the proper version for Laravel 9 support.
Note: this will only upgrade composer, there are more changes that you should review in the documentation provided above so that you can fully upgrade to Laravel 9 correctly.
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升级Laravel需要更多步骤，然后再更新作曲家，但是它们并不是太复杂了。这是指南以及所有步骤：
https://lararavel.com/ docs/9.x/升级＃升级-9.0
要回答这个问题，对于作曲家，您将进行以下更改（来自文档）：
Note ：这只会升级作曲家，您应该在上面提供的文档中进行更多更改，以便您可以正确升级到Laravel 9。
Upgrading Laravel requires a bit more steps then just updating composer, however they aren't too complicated. Here is the guide along with all the steps:
https://laravel.com/docs/9.x/upgrade#upgrade-9.0
To answer the question, for composer you would make the following changes (from the documentation):
Note: this will only upgrade composer, there are more changes that you should review in the documentation provided above so that you can fully upgrade to Laravel 9 correctly.