Mobile Detector

wp-isMobile.php

<?php
// Add to functions.php
// version proof, checks if the visitor is from a mobile device
function muneeb_wp_is_mobile() {

	if ( function_exists( 'wp_is_mobile' ) )
		return wp_is_mobile();

	//code from wp_is_mobile function, wp_is_mobile() is located in wp-includes/vars.php version 3.4
	static $is_mobile;

	if ( isset($is_mobile) )
		return $is_mobile;

	if ( empty($_SERVER['HTTP_USER_AGENT']) ) {
		$is_mobile = false;
	} elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'Mobile') !== false // many mobile devices (all iPhone, iPad, etc.)
		|| strpos($_SERVER['HTTP_USER_AGENT'], 'Android') !== false
		|| strpos($_SERVER['HTTP_USER_AGENT'], 'Silk/') !== false
		|| strpos($_SERVER['HTTP_USER_AGENT'], 'Kindle') !== false
		|| strpos($_SERVER['HTTP_USER_AGENT'], 'BlackBerry') !== false
		|| strpos($_SERVER['HTTP_USER_AGENT'], 'Opera Mini') !== false ) {
			$is_mobile = true;
	} else {
		$is_mobile = false;
	}

	return $is_mobile;

}

// Use anywhere
if ( muneeb_wp_is_mobile() ){
 //do mobile stuff here
}

?>