PHP Manual: Copy the iterator into an array

Description

array iterator_to_array ( Traversable $iterator [, bool $use_keys = true ] )

Copy the elements of an iterator into an array.

Parameters

iterator

The iterator being copied.

use_keys

Whether to use the iterator element keys as index.

In PHP 5.5 and later, if a key is an array or object, a warning will be generated. NULL keys will be converted to an empty string, double keys will be truncated to their integer counterpart, resource keys will generate a warning and be converted to their resource ID, and boolean keys will be converted to integers.

Note:
If this parameter is not set or set to TRUE, duplicate keys will be overwritten. The last value with a given key will be in the returned array. Set this paramater to FALSE to get all the values in any case.

Return Values

An array containing the elements of the iterator.

Changelog

Version	Description
5.5.0	iterator_to_array gained support for key types other than integer and string when the `use_keys` parameter is enabled.
5.2.1	The `use_keys` parameter was added.

Examples

Example #1 iterator_to_array example


<?php
$iterator = new ArrayIterator(array('recipe'=>'pancakes', 'egg', 'milk', 'flour'));
var_dump(iterator_to_array($iterator, true));
var_dump(iterator_to_array($iterator, false));
?>

The above example will output:

array(4) {
  ["recipe"]=>
  string(8) "pancakes"
  [0]=>
  string(3) "egg"
  [1]=>
  string(4) "milk"
  [2]=>
  string(5) "flour"
}
array(4) {
  [0]=>
  string(8) "pancakes"
  [1]=>
  string(3) "egg"
  [2]=>
  string(4) "milk"
  [3]=>
  string(5) "flour"
}