<?php

declare(strict_types=1);

function App(): callable
{

    function show($items)
    {
        array_map(function($item) {
            echo " widht -- " . $item['widht']() . " ";
            echo " height -- " . $item['height']() . "\n";
            echo " apply function -- " . $item['square']() . "\n";
        }, $items);
    }

    function filter($items)
    {
        return array_filter($items, function ($item) {
            return $item['square']() >= 4;
        });
    }

    return function () {
        $item2callback = function ($item) {
            $width = function () use ($item) {
                return $item[0];
            };
            $height = function () use ($item) {
                return $item[1];
            };
            $square = function () use ($width, $height) {
                return $width() * $height();
            };

            return [
                'widht' => $width,
                'height' => $height,
                'square' => $square
            ];
        };

        $firstCollection = array_map($item2callback, json_decode('[[1,2], [3,4], [5,6]]'));
        $secondCollection = array_map($item2callback, json_decode('[[1,2], [3,4], [5,6]]'));

        show($firstCollection);
        show(filter($secondCollection));
    };
}

App()();