safe-type-checking.php

<?php

$filters = is_array($fields['filters']) ? $fields['filters'] : array();

$options = array(
    array('admin-only', @in_array('admin-only', $filters]), __('Admin Only')),
    array('send-email', @in_array('send-email', $filters), __('Send Email')),
    array('expect-multiple', @in_array('expect-multiple', $filters), __('Allow Multiple')),          
);