Créer une extension WordPress

<?php
/*
Plugin Name: Mon premier plugin
Plugin URI: https://mon-siteweb.com/
Description: Ceci est mon premier plugin
Author: Mon nom et prénom ou celui de ma société
Version: 1.0
Author URI: http://mon-siteweb.com/
*/

<?php
/*
Plugin Name: add_role_and_ID_in_WP_body_class
Plugin URI: https://wordpress.ab-formation.fr/2022/07/04/ajouter-la-class-role-and-user-dans-le-body-wordpress-admin-frontend/
Description: Ajouter le role et l'ID du user connecté dans les class du body en back et front office
Author: VPG sur base code www.studiok40.com
Version: 1.0
Author URI: https://wordpress.ab-formation.fr
*/

/**
 * Add User Role Class to Body
 * Referenced code from http://www.studiok40.com/
 */
function print_user_classes() {
    if ( is_user_logged_in() ) {
        add_filter('body_class','class_to_body');
        add_filter('admin_body_class', 'class_to_body_admin');
    }
}
add_action('init', 'print_user_classes');
 
/// Add user role class to front-end body tag
function class_to_body($classes) {
    global $current_user;
    $user_role = array_shift($current_user->roles);
    $classes[] = $user_role.' ';
    return $classes;
}
 
/// Add user role class and user id to front-end body tag
 
// add 'class-name' to the $classes array
function class_to_body_admin($classes) {
    global $current_user;
    $user_role = array_shift($current_user->roles);
    /* Adds the user id to the admin body class array */
    $user_ID = $current_user->ID;
    $classes = $user_role.' '.'user-id-'.$user_ID ;
    return $classes;
    return 'user-id-'.$user_ID;
}