Implement a groupByOwners function that: Accepts an associative array containing the file owner name for each file name. Returns an associative array containing an array of file names for each owner name, in any order. For example, for associative array ["Input.txt" => "Randy", "Code.py" => "Stan", "Output.txt" => "Randy"] the groupByOwners func…

groupByOwners.php

<?php
class FileOwners
{
    public static function groupByOwners($files)
    {
        $file_return = [];
        $files_copy = $files;
        
        print_r($files);
        
        foreach($files as $x => $x_value) {
            $found  = false;
            if (array_key_exists($x_value,$file_return))
                array_push($file_return[$x_value], $x);
            else {
                $file_return[$x_value] = array();
                array_push($file_return[$x_value], $x);
            }
        }
        
        print_r($file_return);
        return NULL;
    }
}

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

function groupByOwners(array $files) : array
{
    $result = [];

    foreach($files as $file => $owner) {
        $result[$owner][] = $file;
    }

    return $result;
}

thanks rkbwp

Thanks