php size of referenced array

Question

I've got a multidimensional array, which refers to itself multiple times. like:

$foo = array(
  0 => array(
    & $foo[1],
    & $foo[2],
    'bar',
  ),
  1 => array(
    & $foo[0],
    & $foo[2],
    'bar',
  ),
  2 => array(
    & $foo[0],
    & $foo[1],
    'bar',
  ),
)

Is there a way to get the size (in bites or in amout of elements) of this array?

Kind Regards,

Tempestas Ludi.

@vusan PHP doesn't mind extra commas at the end of an array. — Barmar
– Barmar, Commented Dec 29, 2012 at 9:00
It's a fairly straightforward recursive algorithm. What have you tried? — Barmar
– Barmar, Commented Dec 29, 2012 at 9:01
What is expected size (elements) of this example? 12 (3 main level + 9 from child arrays), 9 (only child arrays), 6 (3 main level + 3 non references from child), 3 (main level only) or 3 (non references from child arrays)? — dev-null-dweller
– dev-null-dweller, Commented Dec 29, 2012 at 9:57

Samuel Cook · Accepted Answer · 2012-12-29 09:03:39Z

1

You can serialize the array, then determine the bytes using: mb_strlen()

$serialized = serialize($foo);
echo mb_strlen($serialized,'8bit');

answered Dec 29, 2012 at 9:03

Samuel Cook

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