fixed empty docblock

src/APIlite.php

@@ -272,8 +272,11 @@ class APIlite
 		return null;
 	}
 
-	private function parseReturnDoc(string $doc): string|null
+	private function parseReturnDoc(?string $doc): string|null
 	{
+		if (is_null($doc) || $doc === '') {
+			return null;
+		}
 		$lines = explode("\n", $doc);
 		foreach ($lines as $line) {
 			if (strpos($line, '@return') !== false) {
@@ -293,7 +296,7 @@ class APIlite
 		header('Access-Control-Allow-Origin: ' . $origin);
 		header('Access-Control-Allow-Credentials: true');
 		header('Access-Control-Allow-Methods: GET, POST, OPTIONS');
-		header('Access-Control-Allow-Headers: Origin, Content-Type, Accept');
+		header('Access-Control-Allow-Headers: Origin, Content-Type, Accept, Authorization');
 		echo json_encode($arr);
 		exit;
 	}