try to detect if is mobile

gistfile1.php

<?php
/**
 * Check useragent string for mobile device
 *
 * @return boolean if mobile device is detected
 */
function ja_is_mobile() {
	$useragent = isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : "";
	if ( preg_match( '/(alcatel|amoi|android|avantgo|blackberry|benq|cell|cricket|docomo|elaine|htc|iemobile|iphone|ipad|ipaq|ipod|j2me|java|lg|midp|mini|mmp|mobi|motorola|nec-|nokia|palm|panasonic|philips|phone|sagem|sharp|sie-|smartphone|sony|symbian|t-mobile|telus|up\.browser|up\.link|vodafone|wap|wm5|webos|wireless|xda|xoom|zte)/i', $useragent ) ) {
		return true;
	} else {
		return false;
	}
}