PHP script to omit root owned files

Hi guys,

I have created a PHP script for listing files and redirect it on a txtfile. This is only successful if i search a location which is non root. How could i update it to omit those root owned files.

Appreciate your help.
Thanks

PHP:

<?php

// FIND .tar FILES AND SAVE IN A TEXT //

function ob_file_callback($buffer)
  {
    global $ob_file;
    fwrite($ob_file,$buffer);
  }

$ob_file = fopen('tarfile.txt','w');
ob_start('ob_file_callback');


  $Loc="/";

  function Find($Path)
    { 
      $Find="find $Path -path '*.tar'";
      exec($Find,$output,$return_var);
      return $output;    
    }

  $result = Find($Loc);
      if $result 
      
  foreach($result as $single) 
  printf("%s \n",$single);
  return $single;


ob_end_flush()

?>