WP Is Current User

functions.php

<?php
/**
 * Verifica o papel do usuário.
 *
 * Exempo de uso:
 * if (is_current_user('administrator')) {
 *    echo 'Olá administrador';
 * }
 *
 * @param string $user
 *   Indicar o papel do usuário que deseja testar.
 * @return bool
 */
function is_current_user($user) {
    $return = false;
    $current_user = wp_get_current_user();

    switch($user) {
        case 'administrator':
            $return = isset($current_user->caps['administrator']) ? true : false;
            break;
        case 'editor':
            $return = isset($current_user->caps['editor']) ? true : false;
            break;
        case 'author':
            $return = isset($current_user->caps['editor']) ? true : false;
            break;
        case 'contributor':
            $return = isset($current_user->caps['contributor']) ? true : false;
            break;
        case 'subscriber':
            $return = isset($current_user->caps['subscriber']) ? true : false;
            break;
        default:
            break;
    }

    return $return;
}
?>