if($item instanceof \ElggEntity) elseif($item instanceof \ElggRiverItem) elseif($item instanceof \ElggRelationship) elseif(is_callable([ $item, 'getType']))
elgg_extract_class(array $array, array|string $existing=[], string $extract_key='class')
Extract class names from an array, optionally merging into a preexisting set.
elgg_extract($key, $array, $default=null, bool $strict=true)
Checks for $array[$key] and returns its value if it exists, else returns $default.