Initialize optional variable

diff --git a/adminer/include/db.inc.php b/adminer/include/db.inc.php
index 2260a2f5fe69d310443e6184fe72f6dba1e5c882..464fe3a743d483975853c5220aa2ef68efde06d8 100644 (file)
--- a/adminer/include/db.inc.php
+++ b/adminer/include/db.inc.php
@@ -9,10 +9,10 @@ abstract class SqlDb {
        public string $extension; // extension name
        public string $flavor = ''; // different vendor with the same API, e.g. MariaDB; usually stays empty
        public string $server_info; // server version
-       public int $affected_rows; // number of affected rows
-       public string $info; // see https://php.net/mysql_info
-       public int $errno; // last error code
-       public string $error; // last error message
+       public int $affected_rows = 0; // number of affected rows
+       public string $info = ''; // see https://php.net/mysql_info
+       public int $errno = 0; // last error code
+       public string $error = ''; // last error message
        /** @var Result|bool */ protected $multi; // used for multiquery
 
        /** Connect to server