Trying to put PHP code in the Child theme errot

I was wanting to put some PHP in the child these function.php and I got this error. I deleted and reinstalled the bricks child theme and still got this error below.

Caching?

Your PHP code changes were not applied due to an error on line 42 of file wp-content/themes/bricks/includes/elements/code.php(225) : eval()'d code. Please fix and try saving again.

Cannot redeclare print_all_post_meta() (previously declared in wp-content/themes/bricks/includes/elements/code.php(225) : eval()'d code:4)