Prints out the free space and the total space on a web server.

disk-space.php

<?php
  $folder = ".";

  $free  = disk_free_space($folder);
  $total = disk_total_space($folder);


  echo '<strong>Free Space:</strong> ' . formatBytes($free) . ' (' . round( ($free / $total) * 100 , 1) . '%)<br>';

  echo '<strong>Total Space:</strong> ' . formatBytes($total);


  function formatBytes($bytes, $precision = 2) { //https://stackoverflow.com/posts/2510459/revisions
      $units = array( 'B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB' );
      $bytes = max($bytes, 0);
      $pow   = floor(($bytes ? log($bytes) : 0) / log(1024));
      $pow   = min($pow, count($units) - 1);
      $bytes /= pow(1024, $pow);
      return round($bytes, $precision) . ' ' . $units[$pow];
  }

?>