edit

src/Database.php

@@ -1335,6 +1335,7 @@ class Database
                 $i++;
                 $j = 0;
                 foreach ($data as $ki => $vi) {
+                    $body[$j][$i] = '';
                     if (isset($vi[$k])) {
                         $value = $vi[$k];
 
@@ -1347,7 +1348,7 @@ class Database
 
                         //$value = mb_convert_encoding($value,'gb2312','utf-8');
 
-                        $body[$j][] = $value;
+                        $body[$j][$i] = $value;
                         $j++;
                     }
                 }