ISO 8601 Parser for PHP

gistfile1.php

<?php
/**
 * Parse an ISO 8601 duration string
 * @return array
 * @param string $str
 **/
function parseDuration($str)
{
   $result = array();
   preg_match('/^(?:P)([^T]*)(?:T)?(.*)?$/', trim($str), $sections);
   if(!empty($sections[1]))
   {
      preg_match_all('/(\d+)([YMWD])/', $sections[1], $parts, PREG_SET_ORDER);
      $units = array('Y' => 'years', 'M' => 'months', 'W' => 'weeks', 'D' => 'days');
      foreach($parts as $part)
      {
         $result[$units[$part[2]]] = $part[1];
      }
   }
   if(!empty($sections[2]))
   {
      preg_match_all('/(\d+)([HMS])/', $sections[2], $parts, PREG_SET_ORDER);
      $units = array('H' => 'hours', 'M' => 'minutes', 'S' => 'seconds');
      foreach($parts as $part)
      {
         $result[$units[$part[2]]] = $part[1];
      }
   }
   return($result);
}
?>