Change array key without changing order
arrays, php
Solution
Tested and works :)
function replace_key($array, $old_key, $new_key) {
$keys = array_keys($array);
if (false === $index = array_search($old_key, $keys, true)) {
throw new Exception(sprintf('Key "%s" does not exist', $old_key));
}
$keys[$index] = $new_key;
return array_combine($keys, array_values($array));
}
$array = [ 'a' => '1', 'b' => '2', 'c' => '3' ];
$new_array = replace_key($array, 'b', 'e');
Problem
You can "change" the key of an array element simply by setting the new key and removing the old: ``` $array[$newKey] = $array[$oldKey]; unset($array[$oldKey]); ``` But this will move the key to the end of the array. Is there some elegant way to change the key without changing the order? (PS: This question is just out of conceptual interest, not because I need it anywhere.)