How do you sort an associative array by its keys in PHP?

To sort an associative array by its keys in PHP, you would use the ksort() function. The ksort() function arranges the elements of an associative array in ascending order based on their keys. The values associated with each key remain linked to their corresponding keys even after sorting. This function directly modifies the original associative array by rearranging its key-value pairs. Sorting an associative array by keys can be useful when you need to organize and retrieve data based on a specific key order. Learn more: https://www.php.net/manual/en/function.ksort.php