The way to merge two arrays is to alternate the first value in PHP

Question

I have 2 array examples A1 = [1,2,3], A2 = [4,5,6]

The output I need is A3 = [1,4, 2,5,3,6]

That is, the output I need is the first value of the first array, followed by the first value of the second array, and so on

How can I implement this functionality in PHP?

I tried some PHP array functions but didn't get the results I wanted

Answer 1

Here is one way to do this (assuming both arrays are of the same size):

function merge($a1, $a2)
{
    $a3 = [];
    $len = count($a1);
    for($i=0;$i<$len;$i++)
    {
        $a3 []= $a1[$i];
        $a3 []= $a2[$i];
    }
    return $a3;
}

$a1 = [1, 2, 3];
$a2 = [4, 5, 6];
$a3 = merge($a1, $a2);
var_dump($a3);