elgg-api-snippet.php

	// api expose function calls
	elgg_ws_expose_function(
        'get.entity_list',
        'get_entity_list',
        [
                'type' => [
                        'type' => 'string',
                        'required' => true,
                        'description' => 'the type of entity in string format',
                ],
                'subtype' => [
                        'type' => 'string',
                        'required' => false,
                        'description' => 'the subtype of entity in string format, not required',
                ],

        ],
        'retrieves all entities filtered by type [and subtype]',
        'GET',
        false,
        false
	);
}


// api calls
function get_entity_list($type, $subtype) {

	$entities = elgg_get_entities(array(
		'type' => $type,
		'subtype' => $subtype,
		'limit' => 15
	));

	foreach ($entities as $entity) {
		$title_array = json_decode($entity->title, true);
		$description_array = json_decode($entity->description, true);
		$arr[] = array(
			'guid' => $entity->getGUID(),
			'title' => $title_array,
			'description' => $description_array,
			'type' => $entity->getType(),
			'subtype' => $entity->getSubtype(),
			'access_id' => $entity->access_id
		);
	}
	
    return $arr;
}