Started getting the following messages in quite a number of themes (appear on dashboard):
Notice: Undefined offset: 1 in /home/mywong/public_html/wp-includes/theme.php on line 212
Notice: Undefined offset: 1 in /home/mywong/public_html/wp-includes/theme.php on line 213
Haven't touched these files nor made any changes to theme lately.
I switched back to default theme and the errors are still there.
When I try an automatic plugin upgrade, I get : undefined index on file.php (on lines 662, 663, 664, 667 and 668).
I did turn debug on:
define('WP_DEBUG', true);
Are these just warning messages I can safely ignore?