I have tried to run an existing laravel project. But during composer update I got this error:

Question

问题 1

- Root composer.json requires gabrielbull/ups-api ^0.8.0 -> satisfiable by gabrielbull/ups-api[0.8.0].
- gabrielbull/ups-api 0.8.0 requires php ^5.5 || ^7.0 -> your php version (8.0.0) does not satisfy that requirement.

问题2

- Root composer.json requires mehedi-iitdu/laravel-paystack dev-master -> satisfiable by mehedi-iitdu/laravel-paystack[dev-master].
    - mehedi-iitdu/laravel-paystack dev-master requires php ^7.0 -> your php version (8.0.0) does not satisfy that requirement.

问题3

- laravel/framework[v5.8.0, ..., 5.8.x-dev] require php ^7.1.3 -> your php version (8.0.0) does not satisfy that requirement.
- Root composer.json requires laravel/framework 5.8.* -> satisfiable by laravel/framework[v5.8.0, ..., 5.8.x-dev].

Answer 1

错误信息很清楚。您要安装的软件包需要 PHP 7，但您安装了 PHP 8。

您的选择是：

降级您的 PHP 版本
升级你依赖的包版本，如果有更新的PHP 8个兼容版本

I have tried to run an existing laravel project. But during composer update I got this error:

I have tried to run an existing laravel project. But during composer update I got this error:

php

mysql

model

relationship

laravel