array_diff_ukey

Laravel Tech Community

Oct 26, 2020 · Backend Development

Using array_diff_ukey() with a Callback Function to Compute Array Differences by Keys in PHP

This article explains how the PHP function array_diff_ukey() compares array keys using a user‑defined callback, details each parameter and return value, and provides a complete example showing the callback implementation, input arrays, and the resulting diff output.