szurubooru/src/Helpers/InputReader.php

<?php
namespace Szurubooru\Helpers;

final class InputReader extends \ArrayObject
{
	public function __construct()
	{
		parent::setFlags(parent::ARRAY_AS_PROPS | parent::STD_PROP_LIST);

		$_PUT = [];
		if (isset($_SERVER['REQUEST_METHOD']) && $_SERVER['REQUEST_METHOD'] === 'PUT')
			parse_str(file_get_contents('php://input'), $_PUT);

		foreach ([$_GET, $_POST, $_PUT] as $source)
		{
			foreach ($source as $key => $value)
				$this->offsetSet($key, $value);
		}
	}

	public function offsetGet($index)
	{
		if (!parent::offsetExists($index))
			return null;
		return parent::offsetGet($index);
	}

	public function decodeBase64($base64string)
	{
		if ($base64string === null)
			return null;
		$commaPosition = strpos($base64string, ',');
		if ($commaPosition !== null)
			$base64string = substr($base64string, $commaPosition + 1);
		return base64_decode($base64string);
	}
}