Code Structure

Code Architecture

The wp-show-user-role-frontend utility is structured as a standalone functional snippet designed for integration into the WordPress theme layer. It utilizes the WordPress Shortcode API to expose backend user metadata to the frontend.

Component Breakdown

The logic is encapsulated within app.php, which follows a standard WordPress hook-and-callback pattern:

The Callback Function: A PHP function that handles the logic of identifying the current logged-in user and retrieving their specific role capabilities.
Shortcode Registration: The binding of the logic to the [user_role] tag via the add_shortcode hook.

Shortcode Implementation

The primary interface for this tool is the [user_role] shortcode. Internally, the code processes the following:

Authentication Validation: The snippet checks if the visitor is an authenticated user. If the user is a guest, the shortcode returns null or an empty string to prevent data leaks.
Role Extraction: It accesses the $current_user object. Since WordPress users can technically have multiple roles, the implementation specifically targets the primary role string (usually the first index of the roles array).

Usage Example

To display the role of the logged-in user within a post, page, or text widget, use the following syntax:

Hello, you are logged in as a: [user_role]

Technical Specifications

Integration Interface

The snippet is designed to be added to your theme's functions.php file. Once added, the [user_role] shortcode acts as a dynamic placeholder.

Public Interface:

Input: None.
Output: Returns the slug of the current user's role (e.g., administrator, editor, author, subscriber).

Note: This component is intended for frontend display only. It does not provide administrative permissions or modify user capabilities; it purely serves as a data-rendering bridge.