Display a unique customer ID whilst user are logged in
#Use shortcode on any Post/Pages to display the user id of the logged in user [display_user_Id]
#The function in the plugin can be called anywhere like functions.php to display the user Id of the logged in user #Eg.
function ym_show_user_Id() { display_logged_in_user_ID(); } add_action('wp_head', 'ym_show_user_Id');