Answers for "Composer detected issues in your platform: Your Composer dependencies require a PHP version ">= 7.3.0". HOSTINGER"

Composer detected issues in your platform: Your Composer dependencies require a PHP version ">= 7.3.0".

composer install --ignore-platform-reqs

or 
 #add to composer.json > config
"platform-check": false,

composer autoload-dump

Composer detected issues in your platform: Your Composer dependencies require the following PHP extensions to be installed:

composer install --ignore-platform-reqs

or 
 #add to composer.json > config
"platform-check": false,

composer autoload-dump