SimpleXML – referencing iterated members

Hey folks,

I’m at my limits on SimpleXML knowledge. Suppose I have two SimpleXMLElements:

$sessions and $events

$sessions members basically contain FK’s to their parent $event PK’s. And I’d like to put add a reference in the each $event member’s sessions. My initial thought was something like this:

[code=php]foreach ($sessions as $s) {
foreach ($events as $e) {
if ((string)$s->parent_id == (string)$e->id) {
$e->addChild(‘session’, $s);
}
}
}[/code]

The code above ultimately adds “blank” children though — presumably adding a reference to the loop-local $s. And while it seems odd that $s would go out of scope and not $e, the logical solution (in my mind) would be the change the loops:

[code=php]foreach ($sessions as &$s) {
foreach ($events as &$e) {
if ((string)$s->parent_id == (string)$e->id) {
$e->addChild(‘session’, $s);
}
}
}[/code]

No dice again — not allowed: [I]Fatal error: An iterator cannot be used with foreach by reference in …[/I]

Thoughts?

Thanks,

Also in #PHP _↴