<?php    function is_mobile(){        // returns true if one of the specified mobile browsers is detected        $regex_match="/(nokia|iphone|android|motorola|^mot\-|softbank|foma|docomo|kddi|up\.browser|up\.link|";      $regex_match.="htc|dopod|blazer|netfront|helio|hosin|huawei|novarra|CoolPad|webos|techfaith|palmsource|";      $regex_match.="blackberry|alcatel|amoi|ktouch|nexian|samsung|^sam\-|s[cg]h|^lge|ericsson|philips|sagem|wellcom|bunjalloo|maui|";          $regex_match.="symbian|smartphone|midp|wap|phone|windows ce|iemobile|^spice|^bird|^zte\-|longcos|pantech|gionee|^sie\-|portalmmm|";      $regex_match.="jig\s browser|hiptop|^ucweb|^benq|haier|^lct|opera\s*mobi|opera\*mini|320x320|240x320|176x220";      $regex_match.=")/i";              return isset($_SERVER['HTTP_X_WAP_PROFILE']) or isset($_SERVER['HTTP_PROFILE']) or preg_match($regex_match, strtolower($_SERVER['HTTP_USER_AGENT']));  }    /*  allow the user a way to force either the full or mobile versions of the site - use a GET parameter on requests:    include likes to both versions of the site w/ the special force mode parameters, 'mobile' and 'full':    <a href="http://www.example.org/?mobile">View Mobile Site</a>  <a href="http://www.example.org/?full">View Full Site</a>    Always check for 'mobile' or 'full' parameters before accounting for any User-Agent conditions:  */    if ($_GET['mobile']) {   $is_mobile = true;  }    if ($_GET['full']) {   $is_mobile = false;  }  if($is_mobile) {      //it's a mobile browser, do something      header("Location: http://www.yoursite.com/mobile");  } else {      //it's not a mobile browser, do something else      header("Location: http://www.yoursite.com/desktop");      // or instead of a redirect, simply build html below  }    ?>