Theme “adventure” is activated.

Strict Standards: Only variables should be passed by reference in /var/www/wptest/wp-content/themes/adventure/functions.php on line 56

Strict Standards: Only variables should be assigned by reference in /var/www/wptest/wp-content/themes/adventure/functions.php on line 56

Strict Standards: Only variables should be passed by reference in /var/www/wptest/wp-content/themes/adventure/functions.php on line 56

Strict Standards: Only variables should be assigned by reference in /var/www/wptest/wp-content/themes/adventure/functions.php on line 56
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Without any files from japantourguide, almost every page is displayed,although every page has the above message.  I can edit Home to include the media.

I fixed the functions.php somehow, but seems too much.  I dropped &.

Strict Standards:… message gone.

In this situation, adventure-child was activated.

Thereappears another notice in adventure/functions.php: line 145: undefined index.

I fixed it back; line 145 notice remains, but line 56 issue has gone, why?

Anyhow, I cannot change the background image at the moment.

I remember it starts pretty early when I cleared wptest.  I may have done some wrong procedure in installing or activating adventure and adventure-child.

I give up and restarts again from the beginning.