Collection and Map interface

Collection.php

<?php

/**
 * In this example, a collection is a map of values indexed by a key (numeric or string)
 */
interface Collection extends Countable, IteratorAggregate, ArrayAccess
{
    function add($value);
    
    function set($key, $value);
    
    function get($key);
    
    function contains($key);

    function containsValue($value);

    function remove($key);

    function removeValue($value);

    function clear();

    function count();

    function isEmpty();

    function filter(Closure $p);

    function forAll(Closure $p);

    function map(Closure $func);

    function toArray();
}

CollectionAndMap.php

<?php

/**
 * In this example, a Collection is a list of values (not indexed or mapped).
 */
interface Collection extends Countable, IteratorAggregate, ArrayAccess
{
    function add($value);
    
    function addAll(Collection $collection);

    function contains($value);

    function containsAll(Collection $collection);

    function remove($value);

    function removeAll(Collection $collection);

    function clear();

    function count();

    function isEmpty();

    function filter(Closure $p);

    function forAll(Closure $p);

    function map(Closure $func);

    function toArray();
}

/**
 * A map is a list of values indexed by a key
 */
interface Map extends Countable, IteratorAggregate, ArrayAccess
{
    function set($key, $value);

    function get($key);

    function getKeys();

    function getValues();

    function contains($key);

    function containsValue($value);

    function remove($key);

    function clear();

    function count();

    function isEmpty();

    function set($key, $value);

    function filter(Closure $p);

    function forAll(Closure $p);

    function map(Closure $func);

    function toArray();
}