PHP: Best way to iterate two parallel arrays?
iteration, loops, php
Solution
You can use a `MultipleIterator`:
$iterator = new MultipleIterator;
$iterator->attachIterator(new ArrayIterator($array1));
$iterator->attachIterator(new ArrayIterator($array2));
foreach ($iterator as $values) {
var_dump($values[0], $values[1]);
}
You can find more examples concerning the various options in the docs.
Problem
As seen in this other answer, there are several ways to iterate two same-sized arrays simultaneously; however, all of the methods have a rather significant pitfall. Here are some of the caveats with the methods suggested: - You can't use `FALSE` values in one of the arrays. - You can only use scalar values in one of the arrays. - You must use numerically indexed arrays. - Both arrays must share the same keys. - Etc. My question is - is there a method for doing this which doesn't suffer from any of these (or other) significant caveats? Bear in mind that I'm simply asking this out of curiosity; I have no use-case in mind, nor do I even know if such a case actually exists or would be useful/practical in a real-world scenario. However, here is some example data: ``` $arr1 = [ 'a' => 1, 'b' => FALSE, 'c' => new DateTime() ]; $arr2 = [ 'foo', TRUE, 7 ]; ```