- var_dump: documentation ( source)
- unserialize: documentation ( source)
- serialize: documentation ( source)
<?php
$b = "hello";
$x = array();
$x[0] =& $b;
$x[1] =& $b;
$y = unserialize(serialize($x));
$y[0] = 'world';
$x[0] = 'world';
var_dump($x);
var_dump($y);