I'm new to WordPress plugins, and I'm trying to load a external JS/jQuery file with some scripts I need. It needs to run in the wp-admin page (not just once when activated). There is a JS file for a common user and another one for the admin.

function wp_ui_activation() {

register_activation_hook(__FILE__, 'wp_ui_activation');

function wp_ui_deactivation() {

register_deactivation_hook(__FILE__, 'wp_ui_deactivation');

add_action('wp_enqueue_scripts', 'wp_ui_scripts');

function wp_ui_scripts() {  
    wp_enqueue_script('jquery'); //add jquery

    if (!is_admin()) { // it's not admin
        wp_register_script('custom_script', plugins_url('assets/js/custom_script.js', __FILE__),array('jquery')); //register custom_script
        wp_enqueue_script('custom_script'); //add custom_script

    if(is_admin()){ // it's admin
        wp_register_script('custom_admin_script', plugins_url('assets/js/custom_admin_script.js', __FILE__),array('jquery')); //registra custom_admin_script
        wp_enqueue_script('custom_admin_script'); //add custom_admin_script

All that resides inside the JS file is a jQuery(function() {alert("admin")}); and a jQuery(function() {alert("no-admin")}); but none of them shows up...

What am I missing?

1 Answer 1


You need to register/enqueue your admin scripts on admin_enqueue_scripts, not on wp_enqueue_scripts. wp_enqueue_scripts is a front end hook. It won't run on the admin pages.

Secondly, is_admin() just checks whether the page is an admin page, not whether the user is an administrator. To check whether the user is an administrator use:

$current_user = wp_get_current_user();
if (user_can( $current_user, 'administrator' )) {
  // user is an admin



  • Maybe I'm wrong but I think that @ghaschel want to use is_admin() to check if the logged user is an administrator...
    – gmazzap
    Commented Oct 3, 2013 at 14:40
  • @G-M : That may be true but the question also states "It need it needs to run in the wp-admin page..."
    – s_ha_dum
    Commented Oct 3, 2013 at 14:43
  • I writed "the answer is incomplete" and in meantime you updated it... +1 is mandatory ;)
    – gmazzap
    Commented Oct 3, 2013 at 14:48
  • the script just need to run in the wp-admin page. @G.M. exactly, it should check if the logged user is an admin
    – ghaschel
    Commented Oct 3, 2013 at 14:50
  • @ghaschel so now you have your solution in this answer: replace 'wp_enqueue_scripts' with 'admin_enqueue_scripts' and inside wp_ui_scripts() function replace your if statement withe the one posted here by s_ha_dum.
    – gmazzap
    Commented Oct 3, 2013 at 14:59

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