how do I concatenate the string values of two arrays pairwise with PHP?

Question

So I have two arrays

Array
(
[0] => test
[1] => test 1
[2] => test 2
[3] => test 3
)

and

Array
(
[0] => test         


        

Answer 1

There's no built-in function (that I know of) to accomplish that. Use a loop:

$combined = array();
for($i = 0, $l = min(count($a1), count($a2)); $i < $l; ++$i) {
  $combined[$i] = $a1[$i] . $a2[$i];
}

Adapt the loop to your liking: only concatenate the minimum number of elements, concatenate empty string if one of the arrays is shorter, etc.