function isMobile(){

if (isset ($_SERVER['HTTP_X_WAP_PROFILE'])){
    return true;
} 
if (isset ($_SERVER['HTTP_VIA'])){ 
    return stristr($_SERVER['HTTP_VIA'], "wap") ? true : false;
} 
if (isset ($_SERVER['HTTP_USER_AGENT'])){
    $clientkeywords = array ('nokia','sony','ericsson','mot','samsung','htc','sgh','lg','sharp','sie-','philips','panasonic','alcatel','lenovo','iphone','ipod','blackberry','meizu','android','netfront','symbian','ucweb','windowsce','palm','operamini','operamobi','openwave','nexusone','cldc','midp','wap','mobile'); 
    if (preg_match("/(" . implode('|', $clientkeywords) . ")/i", strtolower($_SERVER['HTTP_USER_AGENT'])))
    {
        return true;
    } 
} 
if (isset ($_SERVER['HTTP_ACCEPT'])){ 
    if ((strpos($_SERVER['HTTP_ACCEPT'], 'vnd.wap.wml') !== false) && (strpos($_SERVER['HTTP_ACCEPT'], 'text/html') === false || (strpos($_SERVER['HTTP_ACCEPT'], 'vnd.wap.wml') < strpos($_SERVER['HTTP_ACCEPT'], 'text/html')))){
        return true;
    } 
} 
return false;

}