Company users

<?php
$input = readline();
$company = [];
while (true) {
    if ($input == "End") {
        break;
    }
    $args = explode(" -> ", $input);
    $companyName = $args[0];
    $employeeID = $args[1];
    if (!key_exists($employeeID, $company)) {
        $company[$companyName][] = $employeeID;
    }
    $input = readline();
}

uksort($company, function ($id1, $id2) use ($company) {
    $count1 = count($company[$id2]);
    $count2 = count($company[$id1]);
    if ($count1 === $count2) {
        return $count1 <=> $count2;
    }
    return $count2 <=> $count1;
});
foreach ($company as $key => $value) {
    asort($value);
    $count = count($value);
    echo $key . PHP_EOL;
    foreach ($value as $id) {
        echo "-- " . $id . PHP_EOL;
    }
}