How To Check If the Site Visitor Is Using a Mobile Device

Are you looking for a way to check if the site visitor is using a mobile device? This snippet checks to see if the user is visiting using a mobile device and returns the result as true or false.

Instructions:

1. Add this code to your theme’s functions.php file or in a site-specific plugin.

// 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;

}

2. Then, use this code in your theme template to check if a visitor is using a mobile device.

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

Note: If this is your first time adding code snippets in WordPress, then please refer to our guide on how to properly copy / paste code snippets in WordPress, so you don’t accidentally break your site.

If you liked this code snippet, please consider checking out our other articles on the site like: 9 Best SEO Tools to Grow Your Website Traffic, FAST!