Fatal Error: composer.lock was created for PHP version 7.4 or higher but the current PHP version is 7.3.11

Question

I want to create a Symfony CRUD application. These are the steps I did:

• Downloaded and installed XAMPP from here with PHP 7.3.11 https://www.apachefriends.org/

Answer 1

I solved this by running

$ symfony local:php:refresh

from the project folder, because the output from running $ php --version gave me PHP 7.4.1 (cli) while $ symfony php --version gave me PHP 7.3.13-1+ubuntu16.04.1+deb.sury.org+1.

After the refresh they showed the same versions.

Edit: This required the use of the symfony-binary