I am developing a plugin that uses some external PHP library. That PHP library uses js and CSS. I want to enqueue that external library js and CSS using the Wordpress enqueue functions in Wordpress admin area. I have tried using the add_action('admin_enqueue_scripts', array($this, 'wp_db_fb_co_enqueue_scripts')); on the constructor function of the library but it doesn't work. I think I need to add some action hook as well. Please let me know correct way to do this. Thanks

public function __construct() {
    add_action('admin_enqueue_scripts', array($this, 'pdocrud_admin_enqueue_scripts'));        
public function pdocrud_admin_enqueue_scripts(){
        wp_enqueue_script('wp-db-fb-co-frontend-script-js', WP_DB_FORM_BUILDER_CRUD_OPERATION_PLUGIN_URL . '/assets/js/frontend-script.js');

2 Answers 2


Your code seems correct, but the problem might lie somewhere else. You need to make sure that the path to your JS file is correct and the function pdocrud_admin_enqueue_scripts() is being called correctly.

Also, make sure your constructor is being called in the context of a WordPress action that happens after plugins are loaded. Here's a simple example:

class MyPlugin {
    public function __construct() {
        add_action('admin_enqueue_scripts', array($this, 'enqueue_scripts'));

    public function enqueue_scripts() {
        wp_enqueue_script('my-plugin-script', plugins_url('/assets/js/frontend-script.js', __FILE__));

// Hook into the 'plugins_loaded' action to create an instance of your plugin.
add_action('plugins_loaded', function() {
    new MyPlugin();

In this example, an instance of the MyPlugin class is created on the plugins_loaded action. This is a good place to initialize your plugin, as all the other plugins have been loaded by the time this action fires.

Also, note that in the enqueue_scripts() function, the plugins_url() function is being used to create the URL to the script file. This function generates the correct URL, regardless of where the plugin is installed. The __FILE__ magic constant is being passed as the second argument to plugins_url() to specify that the path should be relative to the current file.

In your case, you'd replace my-plugin-script with wp-db-fb-co-frontend-script-js, and the URL to the script file with your URL.

And remember that wp_enqueue_script() function needs to be called before wp_head() function is executed. The admin_enqueue_scripts action is the appropriate hook to use for enqueuing scripts and styles in the admin area.


The admin_enqueue_scripts action hook is what you want, and then the wp_enqueue_script() and wp_enqueue_style() functions inside to actually register and enqueue the assets to be included.


add_action( 'admin_enqueue_scripts', static function () {
    wp_enqueue_script( 'script-handle', 'https://example.com/script.js', array(), '1.0.2' );
    wp_enqueue_style( 'style-handle', 'https://example.com/style.css', array(), '1.0.2' );
} );
  • I have used the same add_action('admin_enqueue_scripts', array($this, 'pdocrud_admin_enqueue_scripts')); but it's not calling. I have used same function in the plugin and it works perfectly there. Commented Jun 10, 2023 at 5:49
  • How/when is the class initialized?
    – Caleb
    Commented Jun 10, 2023 at 12:42
  • The code suggested is just the same as what OP have already written. Commented Jun 19, 2023 at 12:51
  • @ray-happyforms The OP edited their question after receiving my answer.
    – Caleb
    Commented Jun 19, 2023 at 13:12

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