Shell execute for debugging

main.php

<?php
function shelli($command){
  $ouput = [];
  $return = '';
  exec($command, $output, $return);
  echo "<hr><hr>\n";
  echo "Executing \"$command\" with return value \"$return\".\n";
  echo "<hr><pre>\n" . implode($output, "\n") . "</pre><hr><hr>\n";
}