if( !class_exists('WooCommerceNotifyChanges') ){

class WooCommerceNotifyChanges{

    function __construct(){
        // customer saves main account data
        add_action('woocommerce_save_account_details', array( $this, 'woocommerce_send_notification' ));

        // customer saves billing or shipping data
        add_action('woocommerce_customer_save_address', array( $this, 'woocommerce_send_notification' ));
    }

    function woocommerce_send_notification(){
        $body       = '';
        $to         = 'email@kamtoposlat';    //address that will receive this email
        $subject    = 'Uživatel upravil své údaje';

        $curr_user      = wp_get_current_user();
        $user_id        = $curr_user->ID;
        $curr_username  = $curr_user->data->user_login;

        $body .= '<table>';
        $body .= '<tr><td><strong>Účet</strong></td></tr>';
        $body .= '<tr><td>Uživatel: </td><td>' . $curr_username                                         . '</td></tr>';
        $body .= '<tr><td colspan="2">&nbsp;</td></tr>';
        $body .= '<tr><td colspan="2"><strong>Fakturační údaje</strong></td></tr>';
        $body .= '<tr><td>Křestní jméno: </td><td>' . get_user_meta( $user_id, 'billing_first_name', true ). '</td></tr>';
        $body .= '<tr><td>Příjmení: </td><td>' . get_user_meta( $user_id, 'billing_last_name', true )  . '</td></tr>';
        $body .= '<tr><td>Společnost: </td><td>' . get_user_meta( $user_id, 'billing_company', true )      . '</td></tr>';
        $body .= '<tr><td>Ulice a č.p.: </td><td>' . get_user_meta( $user_id, 'billing_address_1', true )  . '</td></tr>';
        $body .= '<tr><td>Město: </td><td>' . get_user_meta( $user_id, 'billing_city', true )            . '</td></tr>';
        $body .= '<tr><td>PSČ: </td><td>' . get_user_meta( $user_id, 'billing_postcode', true )   . '</td></tr>';
        $body .= '<tr><td>Země: </td><td>' . get_user_meta( $user_id, 'billing_country', true )      . '</td></tr>';
        $body .= '<tr><td>Telefon: </td><td>' . get_user_meta( $user_id, 'billing_phone', true )          . '</td></tr>';
        $body .= '<tr><td>Email: </td><td>' . get_user_meta( $user_id, 'billing_email', true )          . '</td></tr>';
        $body .= '<tr><td colspan="2">&nbsp;</td></tr>';
        $body .= '<tr><td colspan="2"><strong>Doručovací údaje</strong></td></tr>';
        $body .= '<tr><td>Křestní jméno: </td><td>' . get_user_meta( $user_id, 'shipping_first_name', true ). '</td></tr>';
        $body .= '<tr><td>Příjmení: </td><td>' . get_user_meta( $user_id, 'shipping_last_name', true ) . '</td></tr>';
        $body .= '<tr><td>Společnost: </td><td>' . get_user_meta( $user_id, 'shipping_company', true )     . '</td></tr>';
        $body .= '<tr><td>Ulice a č.p.: </td><td>' . get_user_meta( $user_id, 'shipping_address_1', true ) . '</td></tr>';
        $body .= '<tr><td>Město: </td><td>' . get_user_meta( $user_id, 'shipping_city', true )           . '</td></tr>';
        $body .= '<tr><td>PSČ: </td><td>' . get_user_meta( $user_id, 'shipping_postcode', true )  . '</td></tr>';
        $body .= '<tr><td>Země: </td><td>' . get_user_meta( $user_id, 'shipping_country', true )     . '</td></tr>';
        $body .= '</table>';    

        //set content type as HTML
        $headers = array('Content-Type: text/html; charset=UTF-8;');

        //send email
        if( wp_mail( $to, $subject, $body, $headers ) ){
            //echo 'email sent';
        }else{
            //echo 'email NOT sent';                
        }
        //exit();
    }
}
new WooCommerceNotifyChanges(); 
}