composer require yajra/laravel-oci8:^8命令给我以下错误：

C:\Users\yö\PhpstormProjects\BRP>composer require yajra/laravel-oci8:^8
./composer.json has been updated
Running composer update yajra/laravel-oci8
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 yajra/laravel-oci8 8 -> satisfiable by yajra/laravel-oci8[v8.0.0].
    - yajra/laravel-oci8 v8.0.0 requires ext-oci8 >=2.0.0 -> it is missing from your system. Install or enable PHP's oci8 extension.

To enable extensions, verify that they are enabled in your .ini files:
    - C:\PHP74\php.ini
You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode.

windows 10
PHP 7.4.6语言
拉腊维尔8.26.1
PHP Storm 2020.2.3
我没有使用XAMMP或WAMP
我希望有人能帮我一把。先谢谢你。