Maximum function nesting level of '256' reached

• gldixon

• February 24, 2020 at 4:19 am

I’m getting a fatal with acf/load_value where I’m calling get_field within the function:

Fatal error: Uncaught Error: Maximum function nesting level of ‘256’ reached, aborting! in <path>/wp-content/plugins/advanced-custom-fields-pro/includes/acf-utility-functions.php on line 81

Any clues why?

• Elliot

• February 24, 2020 at 2:36 pm

Hi @gldixon

This error suggests an “infinite loop”. It is most likely that your callback is triggering the filter which in turn triggers the callback, etc, etc.

There are many solutions to avoid infinite loops. Using more specific filters, a global variable as a “is doing marker” or even unhooking the filter during callback.

Wishing you all the best.

• gldixon

• February 24, 2020 at 10:17 pm

Thanks Elliot. Yes I’m pretty sure this is the case. Wasn’t aware that the get_field function trips the acf/load_value filter which seems to be the case (and therefore the cause).

I now use a global variable (first time ever!) to avoid calling get_field and this seems to work quite nicely.

Thanks!