iterator_to_array truncated output

Question

iterator_to_array — Copy the iterator into an array
array iterator_to_array ( Traversable $iterator [, bool $use_keys = true ] )

It would work with all Traversable Interface but why am i getting wrong input in the following code:

$data = array(
  0 => array(
    0 => 1,
  ),
  1 => array(
    0 => 2,
  ),
  2 => array(
    0 => 3,
    1 => 4,
    2 => 5,
  ),
  3 => array(
    0 => 6,
  ),
  4 => array(
    0 => 7,
  ),
);


$it =  new RecursiveIteratorIterator(new RecursiveArrayIterator($data));

echo PHP_EOL, iterator_count($it); // 7  total correct
echo PHP_EOL, implode(iterator_to_array($it));  //745  instead of 1234567 
echo PHP_EOL, implode(iterator_to_array($it, true)); //745  instead of 1234567

But

foreach($it as $v)
{
    echo $v ;
}

Output

See online Demo

I see you're trying to use RecursiveArrayIterator, you should totally drop that and use array_walk_recursive() instead =D — Ja͢ck
– Ja͢ck, Commented Dec 21, 2012 at 10:21

Ja͢ck · Accepted Answer · 2012-12-23 05:38:06Z

4

This is because $use_keys is true by default (since 5.1), clobbering your array keys as it's being flattened. You need to disable the setting like this:

print_r(iterator_to_array($it, false));
//                             ^^^^^

If you're running PHP < 5.2.1 you're basically screwed ;-)

edited Dec 23, 2012 at 5:38

answered Dec 21, 2012 at 10:40

Ja͢ck

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