What is the recommended function to use for sorting associative arrays by keys in PHP?

When sorting associative arrays by keys in PHP, the recommended function to use is `ksort()`. This function sorts the array by its keys in ascending order, maintaining the key to data correlations intact. By using `ksort()`, you can easily organize and access the elements of the associative array based on their keys.

// Sample associative array
$fruits = array("Banana" => 2, "Apple" => 5, "Orange" => 3);

// Sorting the associative array by keys
ksort($fruits);

// Output the sorted array
print_r($fruits);