- var_dump: documentation ( source)
- debug_backtrace: documentation ( source)
<?php
class CC
{
private static $bt;
public function run(&$a)
{
self::$bt[] = debug_backtrace();
$a = 222;
}
}
function n(&$a)
{
(new CC())->run($a);
}
$a = [
'a' => 1,
'b' => 2,
'c' => 3
];
n($a['b']);
echo '<pre>';
var_dump($a);