OAIUtils.inc.php

<?php
 
class OAIUtils {
 
   static function UTCDate($timestamp = 0, $includeTime = true) {
      $format = "Y-m-d";
      if($includeTime) {
         $format .= "\TH:i:s\Z";
      }
 
      if($timestamp == 0) {
         return gmdate($format);
 
      } else {
         return gmdate($format, $timestamp);
      }
   }
 
   static function UTCtoTimestamp($date, $requiredGranularity = null) {
      // FIXME Has limited range (see http://php.net/strtotime)
      if (preg_match("/^\d\d\d\d\-\d\d\-\d\d$/", $date)) {
         // Match date
         $time = strtotime("$date UTC");
         return ($time != -1) ? $time : 'invalid';
 
      } else if (preg_match("/^(\d\d\d\d\-\d\d\-\d\d)T(\d\d:\d\d:\d\d)Z$/", $date, $matches)) {
         // Match datetime
         // FIXME
         $date = "$matches[1] $matches[2]";
         if ($requiredGranularity && $requiredGranularity != 'YYYY-MM-DDThh:mm:ssZ') {
            return 'invalid_granularity';
 
         } else {
            $time = strtotime("$date UTC");
            return ($time != -1) ? $time : 'invalid';
         }
 
      } else {
         return 'invalid';
      }
   }
 
 
   static function prepInput(&$data) { // REFERENCE REQUIRED
      if (!is_array($data)) {
         $data = urldecode($data);
 
      } else {
         foreach ($data as $k => $v) {
            if (is_array($data[$k])) {
               self::prepInput($data[$k]);
            } else {
               $data[$k] = urldecode($v);
            }
         }
      }
      return $data;
   }
 
   static function prepOutput(&$data) { // REFERENCE REQUIRED
      if (!is_array($data)) {
         $data = htmlspecialchars($data);
 
      } else {
         foreach ($data as $k => $v) {
            if (is_array($data[$k])) {
               self::prepOutput($data[$k]);
            } else {
               // FIXME FIXME FIXME
               $data[$k] = htmlspecialchars($v);
            }
         }
      }
      return $data;
   }
 
   static function parseStr($string, &$array) {
      $pairs = explode('&', $string);
      foreach ($pairs as $p) {
         $vars = explode('=', $p);
         if (!empty($vars[0]) && isset($vars[1])) {
            $key = $vars[0];
            $value = join('=', array_splice($vars, 1));
 
            if (!isset($array[$key])) {
               $array[$key] = $value;
            } else if (is_array($array[$key])) {
               array_push($array[$key], $value);
            } else {
               $array[$key] = array($array[$key], $value);
            }
         }
      }
   }
}