List/detail with collections

I've done it like this before with perch_content_custom, but it should work with collections also.

$result = perch_content_custom('Collections',[
    'filter'=>'slug',
    'match'=>'eq',
    'value'=>perch_get('s'),
    'skip-template'=>true,
    'return-html'=>true
]);

if (empty(array_filter($result))) {
    // slug doesn't exist, go to first collection item
    $slug = perch_content_custom('Collections',[
        'count'=>1,
        'skip-template'=>true,
        'return-html'=>true
    ]);
    header('Location: https://'.$_SERVER['SERVER_NAME'].'/collections/'.$slug[0]['slug']);
}