How to fix PHP Parse error: syntax error, unexpected '?' in PHP SCRIPT

Описание: How to fix PHP Parse error: syntax error, unexpected '?' in vendor\laravel\framework\src\Illuminate\Foundation\helpers.php on line 500
Who knows what happened?
I am also getting this error while deploying in server
Just upgrade the php version into PHP 7.1
How to fix PHP Parse error
LINK TO DOWNLOAD PHP VERSION 7.4.29 :
https://sourceforge.net/projects/xamp...
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