Is it possible to launch passthru on XAMPP?

Question

When I launch passthru -> exe on XAMPP, it doesn't give errors (PHP). Can I fork exe on XAMPP?

<?php
ini_set('display_errors', '1');
ob_start();
passthru("./Uc/UcCmd.exe 2.uni");
$var = ob_get_contents();
echo $var;

?>

But the file doesn't work How can I check settings?