我要在我的 laravel 项目中安装作曲家，但出现了一条错误，例如您的要求无法解析为一组可安装的软件包。
我试过
/var/www/html/pro $ composer install
然后我得到了
Problem 1
- This package requires php ^7.1.3 but your PHP version (7.0.25) does not satisfy that requirement.
Problem 2
- Installation request for joshbrw/laravel-module-installer ^0.1.4 -> satisfiable by joshbrw/laravel-module-installer[v0.1.4].
- joshbrw/laravel-module-installer v0.1.4 requires composer-plugin-api ^1.1 -> no matching package found.
Problem 3
- laravel/framework v5.7.9 requires php ^7.1.3 -> your PHP version (7.0.25) does not satisfy that requirement.
- laravel/framework v5.7.8 requires php ^7.1.3 -> your PHP version (7.0.25) does …