mobile-detect.php

<?php
// usage: Dashboard_MobileDetect::is(); // == true when mobile, otherwise false

#
# Mobile Detect
# @see http://code.google.com/p/php-mobile-detect/
# @license http://www.opensource.org/licenses/mit-license.php The MIT License
## 
class Dashboard_MobileDetect {

  protected $accept;
  protected $userAgent;
  protected $isMobile = false;
  protected $isAndroid = null;
  protected $isAndroidtablet = null;
  protected $isIphone = null;
  protected $isIpad = null;
  protected $isBlackberry = null;
  protected $isBlackberrytablet = null;
  protected $isOpera = null;
  protected $isPalm = null;
  protected $isWindows = null;
  protected $isWindowsphone = null;
  protected $isGeneric = null;
  protected $devices = array(
    "android" => "android.*mobile",
    "androidtablet" => "android(?!.*mobile)",
    "blackberry" => "blackberry",
    "blackberrytablet" => "rim tablet os",
    "iphone" => "(iphone|ipod)",
    "ipad" => "(ipad)",
    "palm" => "(avantgo|blazer|elaine|hiptop|palm|plucker|xiino)",
    "windows" => "windows ce; (iemobile|ppc|smartphone)",
    "windowsphone" => "windows phone os",
    "generic" => "(kindle|mobile|mmp|midp|pocket|psp|symbian|smartphone|treo|up.browser|up.link|vodafone|wap|opera mini)"
  );

  public function __construct() {
    $this->userAgent = $_SERVER['HTTP_USER_AGENT'];
    $this->accept = $_SERVER['HTTP_ACCEPT'];

    if (isset($_SERVER['HTTP_X_WAP_PROFILE']) || isset($_SERVER['HTTP_PROFILE'])) {
      $this->isMobile = true;
    } elseif (strpos($this->accept, 'text/vnd.wap.wml') > 0 || strpos($this->accept, 'application/vnd.wap.xhtml+xml') > 0) {
      $this->isMobile = true;
    } else {
      foreach ($this->devices as $device => $regexp) {
        if ($this->isDevice($device)) {
          $this->isMobile = true;
        }
      }
    }

    // No, the ipad is not a mobile device...
    if ($this->isMobile && $this->isDevice('ipad')) {
      $this->isMobile = false;
    }
  }

  public function __call($name, $arguments) {
    $device = substr($name, 2);
    if ($name == "is" . ucfirst($device) && array_key_exists(strtolower($device), $this->devices)) {
      return $this->isDevice($device);
    } else {
      trigger_error("Method $name not defined", E_USER_WARNING);
    }
  }

  private static $instance;
  static function load() {
    $class = __CLASS__;
    return ( self::$instance ? self::$instance : ( self::$instance = new $class() ));
  }

  static function is($device = null) {
    if (is_null($device)) {
      return self::load()->isMobile();
    } else {
      return self::load()->isDevice($device);
    }
  }

  public function isMobile() {
    return $this->isMobile;
  }

  protected function isDevice($device) {
    $var = "is" . ucfirst($device);
    $return = $this->$var === null ? (bool) preg_match("/" . $this->devices[strtolower($device)] . "/i", $this->userAgent) : $this->$var;
    if ($device != 'generic' && $return == true) {
      $this->isGeneric = false;
    }
    return $return;
  }

}