<?php

/*
 * Class: mobiled
 * Description: simple mobile browser detection (PHP 5)
 * Author: Filip Oscadal <hide@address.com>, http://www.mxd.cz
 * Version: 1.0.0 (2009-07-13)
 * License: GNU General Public License
 */

  class mobiled
  {

    private $mobile = 0;
    private $version = array();

    // call the detection and send headers
    public function __construct()
    {
      $this->detect();
      $this->header();
      return ($this->mobile) ? $this->getVersion() : 0;
    }

    // detect a mobile browser by parsing $_SERVER variables
    public function detect()
    {
      if (preg_match('/(android|avantgo|blackberry|blazer|elaine|hiptop|iphone|ipod|kindle|midp|mmp|mobile|o2|opera mini|palm|palm os|pda|plucker|pocket|psp|smartphone|symbian|treo|up.browser|up.link|vodafone|wap|windows ce; iemobile|windows ce; ppc;|windows ce; smartphone;|xiino)/i', $_SERVER['HTTP_USER_AGENT'], $this->version)) $this->mobile = 1;
      if (isset($_SERVER['HTTP_X_WAP_PROFILE']) || isset($_SERVER['HTTP_PROFILE'])) $this->mobile = 1;
      if ((strpos($_SERVER['HTTP_ACCEPT'], 'text/vnd.wap.wml') > 0) || (strpos($_SERVER['HTTP_ACCEPT'], 'application/vnd.wap.xhtml+xml') > 0)) $this->mobile = 1;
      return $this->mobile;
    }

    // send special HTTP headers
    public function header()
    {
      if (($this->mobile) && (!headers_sent()))
      {
        // this directive indicates that (most of) the response must not be transformed
        header('Cache-Control: no-transform');
        header('Vary: User-Agent, Accept');
        return true;
      }
      return false;
    }

    // return detected mobile version
    public function getVersion()
    {
      if (isset($this->version[0]))
        unset($this->version[0]);
      return join('|', $this->version);
    }
  }

?>