Simple array proxy class. Helpful when interacting with $_POST, $_GET, etc

gistfile1.php

<?php

namespace Kfriend\Data;

use Closure;

class Proxy extends \ArrayObject
{
    public function __invoke($item, $default = null)
    {
        if ($this->offsetExists($item)) { return $this->offsetGet($item); }
        return $default;
    }

    public function offsetGet($item)
    {
        if ($this->offsetExists($item)) { return parent::offsetGet($item); }
        return null;
    }

    public function isTrue($condition, $whenTrue, $whenFalse)
    {
        $isTrue = false;

        if ($condition instanceof Closure) {
            $isTrue = (bool) $condition();
        }
        else {
            $isTrue = (bool) $condition;
        }

        return ($isTrue) ? $whenTrue : $whenFalse;
    }
}