- debug_zval_dump: 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); //refcount=2
for ($i = 0; $i < 10000; $i++) func($data);
debug_zval_dump($data); //refcount=3