如何通过二级密钥获取特定数组元素的值？

Question

This has to be easy but I am struggling with it. If the array below exists (named "$startersnames") and I specifically want to echo the value that has "qb" as the key, how do I do that?

I assumed $startersnames['qb'], but no luck.

$startersnames[0]['qb'] works, but I won't know that it's index 0.

Array
(
    [0] => Array
        (
            [qb] => Tannehill
        )

    [1] => Array
        (
            [rb] => Ingram
        )

    [2] => Array
        (
            [wr] => Evans
        )

    [3] => Array
        (
            [wr] => Hopkins
        )

    [4] => Array
        (
            [wr] => Watkins
        )

    [5] => Array
        (
            [te] => Graham
        )

    [6] => Array
        (
            [pk] => Hauschka
        )

    [7] => Array
        (
            [def] => Rams
        )

    [8] => Array
        (
            [flex] => Smith
        )

)

Answer 1

For your multi-dim array, you can loop through the outer array and test the inner array for your key.

function findKey(&$arr, $key) {
    foreach($arr as $innerArr){
        if(isset($innerArr[$key])) {
            return $innerArr[$key];
        }
    }
    return ""; // Not found
}

echo findKey($startersnames, "qb");