diff --git a/src/Database/DBA.php b/src/Database/DBA.php
index 9f34a86c15..72769dca9b 100644
--- a/src/Database/DBA.php
+++ b/src/Database/DBA.php
@@ -45,6 +45,7 @@ class DBA
 	 */
 	private static $logger;
 	private static $server_info = '';
+	/** @var PDO|mysqli */
 	private static $connection;
 	private static $driver;
 	private static $error = false;
@@ -496,6 +497,7 @@ class DBA
 					break;
 				}
 
+				/** @var $stmt mysqli_stmt|PDOStatement */
 				if (!$stmt = self::$connection->prepare($sql)) {
 					$errorInfo = self::$connection->errorInfo();
 					self::$error = $errorInfo[2];
diff --git a/src/Protocol/ActivityPub/Receiver.php b/src/Protocol/ActivityPub/Receiver.php
index 99142b50ec..4c34c5e15f 100644
--- a/src/Protocol/ActivityPub/Receiver.php
+++ b/src/Protocol/ActivityPub/Receiver.php
@@ -741,11 +741,11 @@ class Receiver
 	 * @param boolean $trust_source Do we trust the provided object?
 	 * @param integer $uid          User ID for the signature that we use to fetch data
 	 *
-	 * @return array with trusted and valid object data
+	 * @return array|false with trusted and valid object data
 	 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 	 * @throws \ImagickException
 	 */
-	private static function fetchObject($object_id, $object = [], $trust_source = false, $uid = 0)
+	private static function fetchObject(string $object_id, array $object = [], bool $trust_source = false, int $uid = 0)
 	{
 		// By fetching the type we check if the object is complete.
 		$type = JsonLD::fetchElement($object, '@type');
@@ -791,6 +791,7 @@ class Receiver
 		}
 
 		Logger::log('Unhandled object type: ' . $type, Logger::DEBUG);
+		return false;
 	}
 
 	/**
diff --git a/src/Protocol/PortableContact.php b/src/Protocol/PortableContact.php
index 60bb844226..def8f1b628 100644
--- a/src/Protocol/PortableContact.php
+++ b/src/Protocol/PortableContact.php
@@ -749,7 +749,7 @@ class PortableContact
 		$friendica = false;
 		$gnusocial = false;
 
-		if (is_array($nodeinfo['protocols']['inbound'])) {
+		if (!empty($nodeinfo['protocols']['inbound']) && is_array($nodeinfo['protocols']['inbound'])) {
 			foreach ($nodeinfo['protocols']['inbound'] as $inbound) {
 				if ($inbound == 'diaspora') {
 					$diaspora = true;