How to Fix the PHP ACF Error: Trying to Access Array Offset on Value of Type Bool

Описание: Learn how to resolve the common PHP ACF error message "Trying to access array offset on value of type bool" when working with repeater fields in WordPress and Laravel.
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This video is based on the question https://stackoverflow.com/q/63935579/ asked by the user 'zadders' ( https://stackoverflow.com/u/10734966/ ) and on the answer https://stackoverflow.com/a/63940688/ provided by the user 'Howard E' ( https://stackoverflow.com/u/3821467/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Understanding the PHP ACF Error Message

If you've been developing your WordPress theme using PHP and advanced custom fields (ACF), you might have encountered the error message: "Trying to access array offset on value of type bool." This can be particularly confusing, especially when you are working with complex features like repeater fields.

In this guide, we'll dive into what causes this error and how you can resolve it effectively. Specifically, we’ll focus on a situation where you're trying to access text from repeater objects in your ACF configurations while developing a custom theme using Laravel Sage.

Problem Breakdown

In your code, you have created a repeater field called 'tv_lists', which contains sub-fields. The goal is to loop through these repeater fields and output the values on your page. However, the error arises from an attempt to access an array that is not properly defined, due to the absence of a check to ensure that the 'tv_lists' field actually has rows to loop through.

Example Code Context

In your page.blade.php, you have the following code snippet:

[[See Video to Reveal this Text or Code Snippet]]

The error occurs because you're directly calling while without checking if the rows exist.

Solution: Adding a Condition

To resolve the issue, you’ll need to wrap your while loop in an if statement. This ensures that you only attempt to loop through the repeater fields if they exist. Here's how your corrected code should look:

[[See Video to Reveal this Text or Code Snippet]]

Explanation of the Fix

Check for Rows: The addition of the if (have_rows('tv_lists')) statement checks if the tv_lists repeater field has any rows. If not, the code inside the if statement won’t run, preventing the error from occurring.

No More Errors: By ensuring that you only access the rows when they’re present, you avoid trying to access a non-existent array, thus eliminating the error message.

Final Thoughts

Errors like "Trying to access array offset on value of type bool" can be frustrating, especially during development. However, by adding simple checks before your loops, you can maintain a clean and error-free codebase.

Always remember to validate your data structure before attempting to access its contents. Happy coding!