Question

I have two arrays:

$arrKeys = array('str', 'str', 'otherStr');
$arrVals = array('1.22', '1.99', '5.17');

I would like to merge them into something like this

$arrResult = array(
    array('str' => 1.22),
    array('str' => 1.99),
    array('otherStr' => 5.17)
);

The keys are non-unique, otherwise I’d use array_combine. That would give a bit different output, but it would suit me as well.

Can this be done in an elegant way using PHP 5.2.x, without foreach/for loops, preferably using PHP’s built-in functions?

Answer 1

You can use array_map:

$arrKeys = array('str', 'str', 'otherStr');
$arrVals = array('1.22', '1.99', '5.17');
function foo($key, $val) {
   return array($key=>$val);
}

$arrResult = array_map('foo', $arrKeys, $arrVals);

print_r($arrResult);
Array
(
    [0] => Array
        (
            [str] => 1.22
        )

    [1] => Array
        (
            [str] => 1.99
        )

    [2] => Array
        (
            [otherStr] => 5.17
        )

)

BTW, if you upgrade to PHP 5.3 you can do this using an anonymous function, which is a bit more elegant:

array_map(function($key, $val) {return array($key=>$val);}, $arrKeys, $arrVals);