Internet: make getURL() and postURL() return InternetRequestResult objects

this reduces the amount of reference parameters, and generally reduces the number of parameters, while guaranteeing consistency of the APIs.

src/utils/InternetRequestResult.php

@@ -0,0 +1,57 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link http://www.pocketmine.net/
+ *
+ *
+*/
+
+declare(strict_types=1);
+
+namespace pocketmine\utils;
+
+final class InternetRequestResult{
+
+	/**
+	 * @var string[][]
+	 * @phpstan-var list<array<string, string>>
+	 */
+	private $headers;
+	/** @var string */
+	private $body;
+	/** @var int */
+	private $code;
+
+	/**
+	 * @param string[][] $headers
+	 * @phpstan-param list<array<string, string>> $headers
+	 */
+	public function __construct(array $headers, string $body, int $code){
+		$this->headers = $headers;
+		$this->body = $body;
+		$this->code = $code;
+	}
+
+	/**
+	 * @return string[][]
+	 * @phpstan-return list<array<string, string>>
+	 */
+	public function getHeaders() : array{ return $this->headers; }
+
+	public function getBody() : string{ return $this->body; }
+
+	public function getCode() : int{ return $this->code; }
+}