Answers for "- Root composer.json requires php ^8.1 but your php version (8.0.12) does not satisfy that requirement."

Root composer.json requires php ^7.2.5 but your php version (8.0.6) does not satisfy that requirement.

composer install --ignore-platform-reqs

- root composer.json requires php ^7.1.3 but your php version (8.0.3) does not satisfy that requirement.

It's becouse in your project in composer.json file