Set phpStan level to 8 ; Correct errors

.phpstan.neon

@@ -1,5 +1,5 @@
 parameters:
-	level: 6
+	level: 8
 	excludePaths:
 		- Backend/Libraries/vendor/*
 	paths:

Backend/Controllers/NotCalledController.php

@@ -4,13 +4,14 @@ class NotCalledController extends Controller
 {
 	protected array $paths = ['/:type/:id'];
 
-	protected function execute(): View {
+	protected function execute(): View
+	{
 		$layout = new LayoutView();
 		$layout->addChild(new HeadingView('Doesn\'t get called when only using links from the LayoutView'));
 		$layout->addChild(new TextView('Go and work on the Router!'));
-		$layout->addChild(new TextView($this->param('type')));
+		$layout->addChild(new TextView($this->param('type') ?? 'null'));
 		if (($id = $this->param('id')) !== null)
-			$layout->addChild(new TextView("ID: $id"));
+			$layout->addChild(new TextView("ID: {$id}"));
 
 		return $layout;
 	}

Backend/Core/ClassLoader.php

@@ -16,13 +16,14 @@ class ClassLoader
 	 * Main method of the class loader
 	 * Registers the Autoloader
 	 */
-	public static function 파람(): void {
+	public static function 파람(): void
+	{
 		$files = new RecursiveIteratorIterator(new RecursiveDirectoryIterator(__DIR__ . DIRECTORY_SEPARATOR . '..' . DIRECTORY_SEPARATOR . '..' . DIRECTORY_SEPARATOR . 'Backend'), RecursiveIteratorIterator::SELF_FIRST);
-		foreach($files as $file)
+		foreach ($files as $file)
 			if (pathinfo($file->getFileName(), PATHINFO_EXTENSION) == 'php' && !str_contains($file->getPathname(), 'vendor'))
-				self::$classes[str_replace('.php', '', $file->getFileName())] = $file->getPathname();
+				self::$classes[strval(str_replace('.php', '', $file->getFileName()))] = $file->getPathname();
 
-		spl_autoload_register(function($className): void {
+		spl_autoload_register(function ($className): void {
 			if (isset(self::$classes[$className]) && file_exists(self::$classes[$className]))
 				require_once(self::$classes[$className]);
 		}, prepend: true);
@@ -33,7 +34,8 @@ public static function 파람(): void {
 	/**
 	 * Initialize the routes of all controllers
 	 */
-	private static function initControllers(): void {
+	private static function initControllers(): void
+	{
 		foreach (self::$classes as $name => $path) {
 			if (str_contains(str_replace('\\', '/', $path), '/Controllers/')) {		// Replace \ with / for windows users
 				$controller = new $name();

Backend/Core/Data/Query.php

@@ -37,20 +37,22 @@ class Query
 	 * You SHOULD DEFINETELY use placeholders and an array with the values for execution
 	 *
 	 * @param string $queryStr Query as a string
-	 * @param array<string|int,string|float>|null $values Values for placeholders
+	 * @param array<string,string|float>|null $values Values for placeholders
 	 */
-	public function __construct(string $queryStr = '', ?array $values = null) {
+	public function __construct(string $queryStr = '', ?array $values = null)
+	{
 		$this->queryStr = $queryStr;
 		$this->values = $values;
-		$this->con = new PDO('mysql:host='.DB_HOST.'; dbname='.DB_NAME, DB_USER, DB_PASS);
+		$this->con = new PDO('mysql:host=' . DB_HOST . '; dbname=' . DB_NAME, DB_USER, DB_PASS);
 	}
 
 	/**
 	 * Sets a new query string
 	 *
 	 * @param string $queryStr
 	 */
-	public function setQueryString(string $queryStr): void {
+	public function setQueryString(string $queryStr): void
+	{
 		$this->queryStr = $queryStr;
 	}
 
@@ -59,7 +61,8 @@ public function setQueryString(string $queryStr): void {
 	 *
 	 * @return string Current query
 	 */
-	public function getQueryString(): string {
+	public function getQueryString(): string
+	{
 		return $this->queryStr;
 	}
 
@@ -69,7 +72,8 @@ public function getQueryString(): string {
 	 * @param string|null $name ID row name, must be specified if row name doesn't equal "ID"
 	 * @return int|string Last insert ID
 	 */
-	public function lastInsertId(string $name = null): int|string {
+	public function lastInsertId(string $name = null): int|string
+	{
 		if (!$this->run)
 			$this->execute();
 		if ($this->success) {
@@ -91,7 +95,8 @@ public function lastInsertId(string $name = null): int|string {
 	 * @param Model|null $model Model class to be fetched into
 	 * @return mixed Given model or result as array - null if query failed
 	 */
-	public function fetch(Model $model = null): mixed {
+	public function fetch(Model $model = null): mixed
+	{
 		if (!$this->run)
 			$this->execute();
 		if ($this->success) {
@@ -109,7 +114,8 @@ public function fetch(Model $model = null): mixed {
 	 * @see https://bugs.php.net/bug.php?edit=2&id=44341
 	 * @return array<array<int|string,string>>|null Null on error, array with values (as string!) otherwise (PDO::FETCH_ASSOC)
 	 */
-	public function fetchAll(): ?array {
+	public function fetchAll(): ?array
+	{
 		if (!$this->run)
 			$this->execute();
 		if ($this->success)
@@ -121,7 +127,8 @@ public function fetchAll(): ?array {
 	/**
 	 * Executes the query and sets success variable
 	 */
-	private function execute(): void {
+	private function execute(): void
+	{
 		$this->run = true;
 		if (($stmt = $this->con->prepare($this->queryStr)) !== false) {
 			$this->stmt = $stmt;
@@ -134,7 +141,8 @@ private function execute(): void {
 	 *
 	 * @return integer Effected rows
 	 */
-	public function count(): int {
+	public function count(): int
+	{
 		if (!$this->run)
 			$this->execute();
 		return $this->stmt->rowCount();
@@ -143,7 +151,8 @@ public function count(): int {
 	/**
 	 * @return boolean whether the query was successful
 	 */
-	public function success(): bool {
+	public function success(): bool
+	{
 		if (!$this->run)
 			$this->execute();
 		return $this->success;

Backend/Core/System/IO.php

@@ -38,11 +38,13 @@ public static function query(string $var): string | array | null
 	public static function body(string $var): string | array | null
 	{
 		if ($_SERVER['CONTENT_TYPE'] == 'application/json' || $_SERVER['HTTP_CONTENT_TYPE'] == 'application/json') {
-			if (($json = json_decode(file_get_contents('php://input'), true)) !== null && isset($json[$var])) {
-				if (is_string($json[$var]))
-					return htmlspecialchars($json[$var]);
-				elseif (is_array($json[$var]))
-					return $json[$var];
+			if (($input = file_get_contents('php://input')) !== false) {
+				if (($json = json_decode($input, true)) !== null && isset($json[$var])) {
+					if (is_string($json[$var]))
+						return htmlspecialchars($json[$var]);
+					elseif (is_array($json[$var]))
+						return $json[$var];
+				}
 			}
 		} elseif (isset($_POST[$var])) {
 			if (is_string($_POST[$var]))

index.php

@@ -1,32 +1,32 @@
 <?php
 
-declare(strict_types = 1);
+declare(strict_types=1);
 
 $GLOBALS['start'] = microtime(true);		// Meassure execution time -> look in Layout <footer>
 
 // Display errors when debug is set
-/* if (isset($_GET["DEBUG"])) {
+/* if (isset($_GET['DEBUG'])) {
 	ini_set('display_errors', '1');
 	ini_set('display_startup_errors', '1');
 	error_reporting(E_ALL);
 } */
 
 // Global varialbes
 // MySQL Login data
-const DB_HOST = "localhost";
-const DB_NAME = "name";
-const DB_USER = "user";
-const DB_PASS = "pass";
+const DB_HOST = 'localhost';
+const DB_NAME = 'name';
+const DB_USER = 'user';
+const DB_PASS = 'pass';
 
 /**
  * @var string This domain variable is among other things used for security features
  */
-const DOMAIN = "https://schindlerfelix.de";			// Hosted on this domain
-const TITLE = "sample";													// Title of project
+const DOMAIN = 'https://schindlerfelix.de';			// Hosted on this domain
+const TITLE = 'sample';													// Title of project
 
 // Require autoloaders
-require_once("./Backend/Core/ClassLoader.php");	// Load classes
-require_once("./vendor/autoload.php");						// Composer autoloader
+require_once('./Backend/Core/ClassLoader.php');	// Load classes
+require_once('./vendor/autoload.php');						// Composer autoloader
 
 // Application start
 // session_start();		// Start PHP Session