Skype, IIS, or Windows Web Services often block port 80.
PHP 7.1.3 throws deprecation warnings for things that will break later. Common ones: xampp php 7.1.3
Turn off deprecation warnings in php.ini only if you need silent legacy operation: Skype, IIS, or Windows Web Services often block port 80
error_reporting = E_ALL & ~E_DEPRECATED & ~E_STRICT
But better to log and fix them.
Unlike modern XAMPP versions (which ship with PHP 8.x), the official XAMPP website defaults to the latest release. To get version 7.1.3, you must use the Apache Friends archive. Turn off deprecation warnings in php