去packagist找到你想要的版本号，手动修改composer.json为指定版本号，然后更新好依赖即可 packagist.org/packages/laravel/fra...

不同的版本所需要的依赖，和依赖所依赖的版本会有一些差异和冲突，需要去官网文档里面的升级指南部分跟着一步步来，而不是这样粗暴的一条 require 就能解决的。

你这个办法很简单，你新建一个文件夹（别去改原先的项目），单独拷贝这个composer.json并修改这个文件，先去除除laravel以外其他东西，然后你一个一个加（用 composer require命令。），最后全部搞定之后，整个替换vendor文件夹，搞定！

composer update laravel/framework

composer upgrade -w laravel/framework

我觉得我找到原因了,我之前执行了：

composer config -g repo.packagist composer https://mirrors.aliyun.com/composer/

用了ali的镜像，但是这个镜像就只更新到9.33.0
导致我无法更新。。。太坑了

谢谢各位！！！

更新镜像：

~/wwwroot/test$composer config -g repo.packagist composer https://packagist.phpcomposer.com
//然后
~/wwwroot/test$ composer update
Loading composer repositories with package information
Updating dependencies
Your requirements could not be resolved to an installable set of packages.
  Problem 1
    - Root composer.json requires guzzlehttp/guzzle ^7.2, found guzzlehttp/guzzle[7.5.0] in the lock file but not in remote repositories, make sure you avoid updating this package to keep the one from the lock file.
  Problem 2
    - Root composer.json requires laravel/framework ^9.19, found laravel/framework[v9.33.0] in the lock file but not in remote repositories, make sure you avoid updating this package to keep the one from the lock file.
  Problem 3
    - Root composer.json requires laravel/sanctum ^3.0, found laravel/sanctum[v3.2.0] in the lock file but not in remote repositories, make sure you avoid updating this package to keep the one from the lock file.
  Problem 4
    - Root composer.json requires laravel/tinker ^2.7, found laravel/tinker[v2.8.1] in the lock file but not in remote repositories, make sure you avoid updating this package to keep the one from the lock file.
  Problem 5
    - Root composer.json requires fakerphp/faker ^1.9.1, found fakerphp/faker[v1.21.0] in the lock file but not in remote repositories, make sure you avoid updating this package to keep the one from the lock file.
  Problem 6
    - Root composer.json requires laravel/pint ^1.0, found laravel/pint[v1.6.0] in the lock file but not in remote repositories, make sure you avoid updating this package to keep the one from the lock file.
  Problem 7
    - Root composer.json requires laravel/sail ^1.0.1, found laravel/sail[v1.21.1] in the lock file but not in remote repositories, make sure you avoid updating this package to keep the one from the lock file.
  Problem 8
    - Root composer.json requires mockery/mockery ^1.4.4, found mockery/mockery[1.5.1] in the lock file but not in remote repositories, make sure you avoid updating this package to keep the one from the lock file.
  Problem 9
    - Root composer.json requires nunomaduro/collision ^6.1, found nunomaduro/collision[v6.4.0] in the lock file but not in remote repositories, make sure you avoid updating this package to keep the one from the lock file.
  Problem 10
    - Root composer.json requires phpunit/phpunit ^9.5.10, found phpunit/phpunit[9.6.4] in the lock file but not in remote repositories, make sure you avoid updating this package to keep the one from the lock file.
  Problem 11
    - Root composer.json requires spatie/laravel-ignition ^1.0, found spatie/laravel-ignition[1.6.4] in the lock file but not in remote repositories, make sure you avoid updating this package to keep the one from the lock file.

各位大佬回复的更新方法都对 但他喵的是：镜像更新问题和网络问题 暂时不更新了，后面再说， 谢谢热心的大佬们，结贴

设置腾讯云镜像源试试

composer config -g repos.packagist composer https://mirrors.tencent.com/composer/

一样也是被阿里云坑了