Use boolean casting for bitwise and result.

apps/files_sharing/public.php

@@ -133,7 +133,7 @@ if (isset($path)) {
 		$tmpl->assign('mimetype', \OC\Files\Filesystem::getMimeType($path));
 		$tmpl->assign('fileTarget', basename($linkItem['file_target']));
 		$tmpl->assign('dirToken', $linkItem['token']);
-		$allowPublicUploadEnabled = ($linkItem['permissions'] & OCP\PERMISSION_CREATE) !== 0;
+		$allowPublicUploadEnabled = (bool) ($linkItem['permissions'] & OCP\PERMISSION_CREATE);
 		if (\OCP\App::isEnabled('files_encryption')) {
 			$allowPublicUploadEnabled = false;
 		}