Added composer

Optimized MCPremium
Added MCPremiumResponse

.gitignore

@@ -1 +1,3 @@
 .idea
+vendor
+/composer.lock

composer.json

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+{
+	"name": "lukasss93/minecraft-premium-account-checker",
+	"description": "PHP library to check if a Minecraft account is Premium",
+	"license": "MIT",
+	"type": "project",
+	"authors": [
+		{
+			"name": "Luca Patera",
+			"email": "[email protected]",
+			"homepage": "https://www.lucapatera.it/"
+		}
+	],
+	"require": {
+		"php": ">=5.6",
+		"guzzlehttp/guzzle": "^6.3"
+	},
+	"autoload": {
+		"psr-4": {
+			"MCPremium\\": "src/"
+		}
+	}
+}

src/MCPremium.php

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+<?php
+
+namespace MCPremium;
+
+use GuzzleHttp\Client;
+use GuzzleHttp\Exception\ClientException;
+use GuzzleHttp\Psr7\Response;
+
+/**
+ * PHP class to check if a Minecraft account is Premium
+ * Class MCPremium
+ * @package MCPremium
+ */
+class MCPremium {
+	const game = "Minecraft";
+	const version = 12;
+	const api = "https://authserver.mojang.com/authenticate";
+
+	private function __construct() {}
+
+	/**
+	 * Check if an account is premium
+	 * @param $username
+	 * @param $password
+	 * @return \MCPremium\MCPremiumResponse
+	 */
+	public static function check($username, $password) {
+
+		//build parameters
+		$parameters = [
+			'agent'    => [
+				'name'    => self::game,
+				'version' => self::version
+			],
+			'username' => (string)$username,
+			'password' => (string)$password
+		];
+
+		//initialize client
+		$client = new Client();
+		$response = new Response();
+
+		//initialize output
+		$data = null;
+
+		try {
+			//send request
+			$response = $client->post(self::api, [
+				'json' => $parameters
+			]);
+		}
+		catch(ClientException $e) {
+			if($e->hasResponse()) {
+				$response = $e->getResponse();
+			}
+		}
+
+		//get content
+		$content = $response->getBody()->getContents();
+
+		//decode json content
+		$json = \GuzzleHttp\json_decode($content, true);
+
+		//initialize mcpremium response class
+		$output = new MCPremiumResponse();
+
+		//set original content to raw property
+		$output->raw = $json;
+
+		//get values
+		if(array_key_exists('errorMessage', $json)) {
+			$output->error = $json['errorMessage'];
+		}
+		else if(!array_key_exists('selectedProfile', $json)) {
+			$output->error = "Your account is not premium.";
+		}
+		else {
+			$selectedProfile = $json['selectedProfile'];
+
+			//username
+			$output->username=$username;
+
+			//correct_username
+			$output->correct_username = array_key_exists('name', $selectedProfile) ? $selectedProfile['name'] : null;
+
+			//uuid
+			$output->uuid = array_key_exists('id', $selectedProfile) ? $selectedProfile['id'] : null;
+
+			//created_at
+			$output->created_at= array_key_exists('createdAt', $selectedProfile) ? $selectedProfile['createdAt'] : null;
+
+			//check premium
+			if($output->uuid == null && $output->correct_username == null) {
+				$output->error = "Your account is not premium.";
+				$output->premium = false;
+			}
+			else {
+				$output->premium = true;
+			}
+		}
+
+		return $output;
+	}
+}

src/MCPremiumResponse.php

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+<?php
+
+namespace MCPremium;
+
+/**
+ * Response class used by MCPremium class
+ * Class MCPremiumResponse
+ * @package MCPremium
+ */
+class MCPremiumResponse {
+
+	/** @var bool $premium Returns true if the account is premium, otherwise false. */
+	public $premium = false;
+
+	/** @var string Error message. */
+	public $error = null;
+
+	/** @var string $username Entered username. */
+	public $username = null;
+
+	/** @var string Correct username if the account is migrated. */
+	public $correct_username = null;
+
+	/** @var string Universally unique identifier of the account. */
+	public $uuid = null;
+
+	/** @var int $created_at Creation timestamp account */
+	public $created_at=null;
+
+	/** @var array $raw Json response from API */
+	public $raw = null;
+
+	/**
+	 * Returns all class properties as an array.
+	 * @return array
+	 */
+	public function toArray() {
+		$properties = get_object_vars($this);
+		unset($properties['raw']);
+		return $properties;
+	}
+
+}