When sorting arrays in PHP, what is the significance of using array_keys and array_values functions in conjunction with array_multisort?

When sorting arrays in PHP using array_multisort, it is important to use array_keys and array_values functions to ensure that the keys are maintained while sorting the values. This is necessary because array_multisort only sorts the values of the array and does not maintain the original keys. By using array_keys to get the keys of the array and array_values to get the values, you can sort the values while preserving the original keys.

// Sample array to be sorted
$array = array("b" => 4, "a" => 1, "c" => 3);

// Get the keys and values of the array
$keys = array_keys($array);
$values = array_values($array);

// Sort the values while maintaining the keys
array_multisort($values, $keys);

// Combine the sorted keys and values back into an array
$sorted_array = array_combine($keys, $values);

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