fix 17 PHPStan errors

src/Protocol/ATProtocol/Processor.php

@@ -279,7 +279,7 @@ class Processor
 		$uri = $this->getUri($post);
 
 		if ($uri_id = $this->fetchUriId($uri, $uid)) {
-			return $uri_id;
+			return (int) $uri_id;
 		}
 
 		if (empty($post->record)) {
@@ -322,7 +322,7 @@ class Processor
 			$this->logger->warning('Fetched post was not inserted', ['guid' => $item['guid'], 'uri' => $item['uri']]);
 		}
 
-		return $this->fetchUriId($uri, $uid);
+		return (int) $this->fetchUriId($uri, $uid);
 	}
 
 	private function getHeaderFromJetstream(stdClass $data, int $uid, int $protocol = Conversation::PARCEL_JETSTREAM): array
@@ -860,7 +860,7 @@ class Processor
 			$this->logger->debug('Post with extid exists', ['uri' => $uri]);
 			return $reply['uri-id'];
 		}
-		return 0;
+		return '0';
 	}
 
 	private function getPostUids(string $uri, bool $with_public_user): array

src/Protocol/ActivityPub/Receiver.php

@@ -250,7 +250,7 @@ class Receiver
 	 * @param string  $object_id Object ID of the provided object
 	 * @param integer $uid       User ID
 	 *
-	 * @return string with object type or NULL
+	 * @return string|null string with object type or NULL
 	 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 	 * @throws \ImagickException
 	 */

src/Protocol/DFRN.php

@@ -607,13 +607,16 @@ class DFRN
 	 * @param string      $element  Element name for the activity
 	 * @param string      $activity activity value
 	 * @param int         $uriid    Uri-Id of the post
-	 * @return DOMElement XML activity object
+	 * @return DOMElement|false XML activity object or false on error
 	 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 	 * @todo  Find proper type-hints
 	 */
 	private static function createActivity(DOMDocument $doc, string $element, string $activity, int $uriid)
 	{
-		if ($activity) {
+		if (!$activity) {
+			return false;
+		}
+
 		$entry = $doc->createElement($element);
 
 		$r = XML::parseString($activity);
@@ -664,9 +667,6 @@ class DFRN
 		return $entry;
 	}
 
-		return false;
-	}
-
 	/**
 	 * Adds the elements for attachments
 	 *
@@ -1925,7 +1925,7 @@ class DFRN
 		// Check if the message is wanted
 		if (!self::isSolicitedMessage($item, $importer)) {
 			DBA::delete('item-uri', ['uri' => $item['uri']]);
-			return 403;
+			return;
 		}
 
 		// Get the type of the item (Top level post, reply or remote reply)
@@ -2051,7 +2051,7 @@ class DFRN
 					Item::distribute($posted_id);
 				}
 
-				return true;
+				return;
 			}
 		} else { // $entrytype == self::TOP_LEVEL
 			if (($item['uid'] != 0) && !Contact::isSharing($item['owner-id'], $item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
@@ -2099,7 +2099,7 @@ class DFRN
 		}
 
 		if (!$uri || !$importer['id']) {
-			return false;
+			return;
 		}
 
 		$condition = ['uri' => $uri, 'uid' => $importer['importer_uid']];

src/Protocol/Diaspora.php

@@ -337,7 +337,7 @@ class Diaspora
 	 * @param string $xml      urldecoded Diaspora salmon
 	 * @param string $privKey  The private key of the importer
 	 *
-	 * @return array
+	 * @return array|false array with decoded data or false on error
 	 * 'message' -> decoded Diaspora XML message
 	 * 'author' -> author diaspora handle
 	 * 'key' -> author public key (converted to pkcs#8)
@@ -1051,7 +1051,7 @@ class Diaspora
 	 * @param string $server The url of the server
 	 * @param int    $level  Endless loop prevention
 	 *
-	 * @return array
+	 * @return array|false The message as array or false on error
 	 *      'message' => The message XML
 	 *      'author' => The author handle
 	 *      'key' => The public key of the author
@@ -2795,7 +2795,7 @@ class Diaspora
 		// without a public key nothing will work
 		if (!$pubkey) {
 			DI::logger()->notice('pubkey missing: contact id: ' . $contact['id']);
-			return false;
+			return '';
 		}
 
 		$aes_key   = random_bytes(32);
@@ -2809,7 +2809,7 @@ class Diaspora
 
 		$encrypted_key_bundle = '';
 		if (!@openssl_public_encrypt($json, $encrypted_key_bundle, $pubkey)) {
-			return false;
+			return '';
 		}
 
 		$json_object = json_encode(