Скачать или смотреть Fixing the array_multisort Issue: Sorting Arrays in PHP 8

Discover how to solve the `array_multisort` failure in PHP 8 when sorting arrays by title while ignoring leading non-letters. Find structured solutions here!
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Resolving the array_multisort Issue in PHP 8

Sorting arrays in PHP is a common task that developers encounter regularly. However, if you've recently upgraded from PHP 7.4 to PHP 8.1.14, you may have run into the frustrating array_multisort issue regarding sorting arrays of pages by their titles. In this guide, we will explore the problem, clarify what has changed, and present a solution to get your sorting tasks back on track.

The Problem: Sorting Arrays with array_multisort

You might have encountered an issue with your previous code when trying to sort an array of pages. The objective was to sort their titles while ignoring any leading non-letter characters. Here’s the sample code that you started with:

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

Output in PHP 7.4

When run in PHP 7.4, the code provided the correct output as follows:

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

The PHP 8 Error

Upon running the same code in PHP 8.1.14, instead of a successful sort, you encountered the following error:

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

This error situation arose because PHP 8 introduced stricter error handling compared to PHP 7.4, which would only give a notice instead of a warning or error.

Understanding the Issue: What Changed?

The core issue lies in how array_multisort is structured in your code:

In PHP 8, it's important to recognize that the first array provided to array_multisort should be the one you want sorted.

The transformation to ignore leading non-letters should be applied correctly so that PHP can sort the right values.

Key Differences Between PHP 7.4 and PHP 8

Error Handling: PHP 8 has made error-checking more robust; what would previously show as a notice is now escalated to a warning (or error) depending on your configuration.

Sorting Logic: The order and structure of the parameters in array_multisort are critical and need attention to ensure correct functionality.

Solution: Correcting the array_multisort Usage

To resolve this problem, let's adjust the way you call array_multisort to ensure you're sorting using the transformed array. The corrected code will look like this:

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

Explanation of the Modified Code:

Using array_map First: This allows you to transform the titles of the pages to lower case and remove leading non-letter characters before sorting.

Rearranging Parameters: With this adjustment, the sorted array now reflects the changes correctly, allowing PHP 8 to handle it without issues.

Conclusion

Switching from PHP 7.4 to PHP 8 may seem daunting due to new errors and warnings, but understanding how array_multisort functions and adjusting your parameter usage will enable you to sort arrays effectively once again. By following the steps laid out in this article, your code will now work seamlessly in the latest PHP version, leading to correct and expected output.

If you have any further questions or need additional assistance regarding these changes in PHP, feel free to reach out! Happy coding!