<?php
  // Sample REST server - returns uptime information
  // Jesus M. Castagnetto
  
  $re = '/^\s*([0-9]{1,2}:[0-9]{2}(am|pm))\s+up (.+),';
  $re .= '\s+(\d+) users,\s+load average: (.+), (.+), (.+)/';
  
  $now = time();
  $uptime = `uptime`;
  preg_match($re, $uptime, $part);

  $timestamp = gmdate('Y-m-d H:i:s', $now);
  $uptime = array(
          'time'   => $part[1],
          'duration' => $part[3],
          'users'  => (int)$part[4],
          'load1'   => (float)$part[5],
          'load5'   => (float)$part[6],
          'load15'  => (float)$part[7],
      );
  $packet = wddx_packet_start('uptime info');
  wddx_add_vars($packet, 'timestamp', 'uptime');
  $out = wddx_packet_end($packet);
  echo $out;
?>