按值关联数组的PHP组键

Question

function groupByOwners(array $files) : array { return []; }

$files = array("Input.txt" => "Randy","Code.py" => "Stan","Output.txt" =>"Randy"); 

Print_r(groupByOwners($files);

Answer 1

您的问题到处都是。这是您要找的吗？

function groupByOwners($files) {
    foreach ($files as $key => $val) {
        $arr[$val] = $key;
    }
    return print_r($arr);   
}

$files = array("Input.txt" => "Randy","Code.py" => "Stan","Output.txt" =>"Randy"); 

groupByOwners($files);