function keep()
{
foreach (func_get_args() as $var) {
if (is_object($var)) {
if (method_exists($var, 'keep')) {
$var->keep();
}
} elseif (is_array($var)) {
foreach ($var as $k => $v) {
//echo 'keep '.$k;
keep($v);
}
}
}
}
public static function onShutdown()
{
keep($_SESSION);
// do not destroy models
}
public function keep()
{
// protect from destroying after script ends (to allow saving in $_SESSION)
$this->isDestroyed = true;
foreach ($this->_properties as $property) {
keep($property);
// destroy backlinks to model
}
}
