The following script :

<?
class foo {
function affiche_dict() {
  $this->dict[date_message] = $toto;
  while (list($key, $val) = each($this->dict)) {}
}
}
  $bar = new foo;
  $err = $bar->affiche_dict();
?>

produces :

1:22 [webase3:p3] titi:~/html% php test.php
Content-Type: text/html

test.php:  Freeing 0x080F0308 (41 bytes), allocated in zend_hash.c on line 175<br>
test.php:  Freeing 0x080F02B8 (35 bytes), allocated in zend_hash.c on line 380<br>
test.php:  Freeing 0x080F5D48 (4 bytes), allocated in zend_hash.c on line 391<br>