Reference with PHP SplDoublyLinkedList

Question

I'm trying to modify the value of my array which is itself in a linked list Sounds like:

  $z = new SplDoublyLinkedList();

  $z->push(array('Hello', 0));
  $z->push(array('world', 4));

  $p = & $z->offsetGet(1);                // reference ?

  $p[0]='change';                         // indirection like ? 
  $p[1]=5;


  $q = &$z->offsetGet(1);                 // element of my array remains "world", 4

But it doesn't work. Of course, If I push class object, it works...

Is there a way to have the same behaviour with array() ? ... Obviously and according to SplDoublyLinkedList declaration, I can't... :(

You know your code triggers a warning ~ "PHP Strict Standards: Only variables should be assigned by reference" — Phil
– Phil, Commented May 13, 2014 at 6:34
Do you also have warning? I have "Strict standards: Only variables should be assigned by reference" for line 8 and 14 — Marcin Nabiałek
– Marcin Nabiałek, Commented May 13, 2014 at 6:34
you would have to roll your own setter, because arrayaccess.offsetset doesn't set by reference. — pce
– pce, Commented May 13, 2014 at 6:34

user3587554 · Accepted Answer · 2014-05-13 08:02:13Z

0

Use the offsetSet() method

  $z = new SplDoublyLinkedList();

  $z->push('Hello');
  $z->push('world');

  $z->offsetSet(0, 'change');
  $z->offsetSet(1, 5);


  $q = $z->offsetGet(1);

I don't think this class accepts arrays as the input type for push.

answered May 13, 2014 at 8:02

user3587554

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