 ---------------- Here's an example: https://woocommerce.github.io/code-reference/classes/WC-Data.html#property_meta_data I did a bit of digging, and here are some lines you can see in the HTML files:  It seems like something is interpreting `"false"` as `"\false"` and is interpreting `"null"` as `"\null"`. https://www.php.net/manual/en/regexp.reference.escape.php