<?php
$myObj = [ "name" => "Freddy" ];
function alter($obj) {
$obj["band"] = "Queen";
return $obj;
}
$obj2 = alter($myObj);
echo "<pre>", var_dump($obj2), "</pre>";
PD9waHAKCiRteU9iaiA9IFsgIm5hbWUiID0+ICJGcmVkZHkiIF07CgpmdW5jdGlvbiBhbHRlcigkb2JqKSB7Cgkkb2JqWyJiYW5kIl0gPSAiUXVlZW4iOwoJcmV0dXJuICRvYmo7Cn0KCiRvYmoyID0gYWx0ZXIoJG15T2JqKTsKCmVjaG8gIjxwcmU+IiwgdmFyX2R1bXAoJG9iajIpLCAiPC9wcmU+Ijs=