Convert two or more Simple Arrays to Multidimensional Array?

Question

Given that I have these arrays:

$array1:

Array
(
    [0] => Title1
    [1] => Title2
    [2] => Title3
    [3] => Title4
...

$array2:

Array
(
    [0] => A
    [1] => B
    [2] => C
    [3] => D
...

$array3:

Array
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 4
...

I want to convert all the upper arrays into one Multidimensional Array that looks like this:

Array
(
    [0] => Array
        (
            [0] => Title1
            [1] => A
            [2] => 1
        )

    [1] => Array
        (
            [0] => Title2
            [1] => B
            [2] => 2
        )

    [2] => Array
        (
            [0] => Title3
            [1] => C
            [2] => 3
        )
...

I have this code that does what I want but is excessive and inefficient:

$result1 = array();
foreach($array1 as $key => $value) {
    $tmp = array($value);
    if (isset($array2[$key])) {
        $tmp[] = $array2[$key];
    }
    $result1[] = $tmp;
}

$result2 = array();
$i=0;
foreach($result1 as $value){
  $result2[$i] = $value;
  $result2[$i][] = $array3[$i];
  $i++;
}

print_r($result2);

In terms of efficiency, how can I improve my code? Can this be done all in one "foreach"? What about if I have ten or even more simple arrays? If this is the case, using my code I would have to copy down the second foreach and change the variables for each other array that comes after the first two arrays.

Answer 1

This should work for you:

Just use array_map() to loop through all arrays at once, e.g.

$result = array_map(function($v1, $v2, $v3){
    return [$v1, $v2, $v3];
}, $array1, $array2, $array3);

Or you can use call_user_func_array(), so if you expand you only have to add the variables to the array and don't have to add the arguments in the anonymous function:

$result = call_user_func_array("array_map", [NULL, $array1, $array2, $array3]);

Answer 2

array_map() is the way to go but it's much easier:

$result = array_map(null, $array1, $array2, $array3);