2.3/Collection_8php_source.html

 <?php

 namespace Elgg\Structs;


 use Countable;

 use Iterator;


 interface Collection extends Countable, Iterator {


     public function filter(callable $filter);


     public function contains($item);


     public function map(callable $mapper);

 }

Elgg\Structs\Collection
A read-only interface to a (possibly mutable) group of items.
Definition: Collection.php:33

Elgg\Structs\Collection\contains
contains($item)
Returns true iff the item is in this collection at least once.

Elgg\Structs\Collection\map
map(callable $mapper)
Take items of the collection and return a new collection with all the items having the $mapper applie...

Elgg\Structs\Collection\filter
filter(callable $filter)
Returns a new collection only containing the elements which pass the filter.

$filter
if(! $vars['title'] && $vars['title'] !==false) if(isset($vars['filter_override'])) if(!isset($vars['filter']) &&elgg_is_logged_in() && $context) $filter
Definition: content.php:62

$item
if(! $items) $item
Definition: delete.php:17