Meta Box

Hi Peter,
Thank you for the reply.

Here are the error messages:

Warning: Undefined array key "id" in /var/www/domain.com/htdocs/wp-content/plugins/meta-box-aio/vendor/meta-box/meta-box-builder/src/Register.php on line 29 (Multiple Lines)

Warning: Cannot modify header information - headers already sent by (output started at /var/www/domain.com/htdocs/wp-content/plugins/meta-box-aio/vendor/meta-box/meta-box-builder/src/Register.php:29) in /var/www/domain.com/htdocs/wp-includes/functions.php on line 7168

Warning: Cannot modify header information - headers already sent by (output started at /var/www/domain.com/htdocs/wp-content/plugins/meta-box-aio/vendor/meta-box/meta-box-builder/src/Register.php:29) in /var/www/domain.com/htdocs/wp-includes/functions.php on line 7144

Fatal error: Uncaught TypeError: Unsupported operand types: string & int in /var/www/domain.com/htdocs/wp-includes/class-wp-rewrite.php:1036 Stack trace: #0 /var/www/domain.com/htdocs/wp-includes/class-wp-rewrite.php(1413): WP_Rewrite->generate_rewrite_rules() #1 /var/www/domain.com/htdocs/wp-includes/class-wp-rewrite.php(1513): WP_Rewrite->rewrite_rules() #2 /var/www/domain.com/htdocs/wp-includes/class-wp-rewrite.php(1888): WP_Rewrite->refresh_rewrite_rules() #3 /var/www/domain.com/htdocs/wp-includes/rewrite.php(282): WP_Rewrite->flush_rules() #4 /var/www/domain.com/htdocs/wp-admin/options-permalink.php(212): flush_rewrite_rules() #5 {main} thrown in /var/www/domain.com/htdocs/wp-includes/class-wp-rewrite.php on line 1036

Hi,

Sorry for reviving old topics, I've stumbled upon another problem.

How do I display the output if value is unchecked?

I tried the above code with "if value not in item", but it doesn't work.

Thanks.