Shortcode for restricting things based on ANY WordPress role

wo_is_role.php

<?php 


/**
 * Creates a shortcode [wo_is_role] that allows you to restrict anything inside to a particular role or roles.
 * To use: [wo_is_role role="subscriber"] Put content here to show subscriber [/wo_is_role]
 * To use with multiple roles: [wo_is_role role="contributor,subscriber"] Put content here to show contributors and susbcribers. [/wo_is_role]
 *
 * Works with ANY role, including all custom roles.
 */
add_shortcode( 'wo_is_role', 'wo_role_based_permission' );

function wo_role_based_permission( $atts, $content = null ) {
    extract( shortcode_atts( array(
            'role' => '',
        ), $atts, 'wo_is_role' ) );

    $cuser = wp_get_current_user();
    $user_role = $cuser->roles;
    $roles_allowed = explode(",", $role);
    
    if ( in_array( $user_role[0], (array) $roles_allowed ) ) {
	    	// you can add in what you want here. In this case, this let's you add in any content and other shortcodes 		      inside that will only be shown to the allowed roles.
		return do_shortcode( $content );   
	}
}