如何在laravel 5.4.36中将我的php版本从7.3.4降级到7.0.0？

I want to downgrade the version of php from 7.3.4 to 7.0.0 in my laravel project. Please suggest how to do it?

I am using artisan serve.

I am using laravel version 5.4.36

This answer might be a solution for you to downgrade your php version.

https://stackoverflow.com/a/46786305/6654987

Try lower the Laravel version. Change the value inside the composer.json to Laravel 5.x, delete the vendor folder and run composer install.