How to to list the all wordpress roles in selectbox

In your theme code backend or plugin code you can list your wp roles. You need to display wordpress users roles many times in theme configuration and plugins page. For fetching the wp users roles you can use the following code.

$roles_obj = new WP_Roles();
$roles_names_array = $roles_obj->get_names();
echo '<select name="role">';
foreach ($roles_names_array as $role_name) {
	echo '<option>'.$role_name.'</option>';
}
echo '</select>';