Get similar Perch Collection items

perch_collection_similar_items.php

<?php

// get the main item for the detail page
// assuming you're getting the slug from the URL
$item = perch_collection('Case Studies', [
	'template'      => 'case_studies/_detail',
	'skip-template' => true,
	'return-html'   => true,
	'filter'        => 'slug',
	'value'         => perch_get('s'),
]);


// respond with 404 when appropriate
if (!isset($item[0])) {
	PerchSystem::use_error_page(404);
	exit;
}


// get the category path(s) from the item
// normally you'd be able to use $item[0]['categories'] directly, but Perch sometimes return the category IDs so use pipit_category_get_path()
$categories = [];
if (isset($item[0]['categories'])) {
	foreach ($item[0]['categories'] as $cat) {
		$categories[] = pipit_category_get_path($cat);
	}
}



// output main item
echo $item['html'];


// output similar items
if (!empty($categories)) {
	perch_collection('Case Studies', [
		'template'      => 'case_studies/_list',
		'category'      => $categories,
		'filter'        => 'slug',
		'match'         => 'neq',
		'value'         => perch_get('s'),
	]);
}