Please explain ‘Choices Callback’

  • I’ve been struggling for hours to find some guidance as to how to make the Choices Callback work, I don’t know how to populate the defined field. I found how to do the function at https://www.snip2code.com/Snippet/1669213/Example-Callback-function-for-Ultimate-M/, but when I add getCities() to the Choices Callback field in the editor, it says I must still add edit choices, so I can’t continue.

    What are the steps to populate the field, what should be in the
    Choices Callback and Edit Choices fields in the editor when my function’s name is getCities() in functions.php?

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  • Thread Starter meneeroom

    (@meneeroom)

    I found a solution by trying 1mil things.

    The WP Backend Field must look like this:

    The Edit Choices field can’t be empty (this is definitely a bug), so you have to put something in there like an *.

    Then, in the Choices Callback field, you must add your PHP function name, with no brackets. Ie, if your PHP function in functions.php is function getCities(){...}, the field must contain only getCities.

    Thanks for putting the solution to your problem. That is very helpful. I am just starting to work with callback choices and you just saved me major future headaches. Thanks!

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