- array_replace_recursive: documentation ( source)
- json_encode: documentation ( source)
<?php
function func(&$data) {
foreach ($data as $key => $value) {
if (is_array($value)) {
func($data[$key]);
}
}
}
$data = [
['zero' => [0]],
['one' => [1]],
];
//debug_zval_dump($data[1]['one']); //refcount(2)
func($data);
//debug_zval_dump($data[1]['one']); //refcount(3)
array_replace_recursive($data[0], $data[1]);
echo json_encode($data);