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I've got an array that looks like this:

Array
(
    [0] => Array
        (
        [id] => abc
        [name] => Charlotte
        [state] => NC
        )
    [1] => Array
        (
        [id] => def
        [name] => Tampa
        [state] => FL
        )
)

What I am trying to do is pull two of the values from each nested array ('id' and 'name'), run a function on them, and return an array that is then nested. So, for each 'id' and 'name,' pass that to "function work($id,$name)," which returns an array, such that the resulting array looks like this:

Array
(
    [0] => Array
        (
        [id] => abc
        [name] => Charlotte
        [state] => NC
        [restaurants] => Array (
                               [rname] => Good Burger
                               [rname] => McD
                               )
        )
    [1] => Array
        (
        [id] => def
        [name] => Tampa
        [state] => FL
        [restaurants] => Array (
                               [rname] => BK
                               [rname] => White Castle
                               )
        )
)

My searches on here found a few ways of pulling the values from the original arrays (foreach() loop), but I am unsure of the best way to pass these values to a function (array_walk doesn't appear to be an option in this case?), and especially of how to return a nested array into another nested array.

Am glad to provide clarification is need be.

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2 Answers

up vote 1 down vote accepted 
foreach ($array as $key => $value){
   $array[$key]['restaurants'] = work($value['id'],$value['name']);
}

function work($id,$name){
    $results = array();
    ///process data
    return $results;
}
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up vote 1 down vote

Try something like this:

foreach($cities as &$city){
    $city['restaurants'] = work($city['id'],$city['name']);
}

Demo with a dummy function.

The &$city tells PHP that you want to be able to modify the record in your loop (passes the array by reference instead of as a copy).

After this, you can simply set the restaurants value to the array returned by the work function.

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