phpinfo() with IBM Cloud Functions - This output will be the Plain Text version.

phpinfo.php

<?php
function main(array $args) : array
{
  ob_start();
  phpinfo();
  $phpinfo = ob_get_contents();
  ob_end_clean();

  return [
    "headers" => ['Content-Type' => 'text/plain'],
    "body" => $phpinfo
  ];
}