@see: https://stackoverflow.com/questions/44715589/current-directory-is-not-within-php-include-path-xammp
You need to fix your include_path in php.ini.
In that file you will find a line that says something similar to:
"include_path = C:\xampp7\php\PEAR".
To fix change the line below
From include_path=C:\xampp7\php\PEAR to include_path=".;C:\xampp7\php\PEAR"