<?php
$_GET["id"] = 1;
function get_id() {
$var = "_GET";
return ${$var}["id"];
}
echo get_id(), PHP_EOL;
PD9waHAKCiRfR0VUWyJpZCJdID0gMTsKCmZ1bmN0aW9uIGdldF9pZCgpIHsKICAgIAogICAgJHZhciA9ICJfR0VUIjsKICAgIAogICAgcmV0dXJuICR7JHZhcn1bImlkIl07Cn0KCmVjaG8gZ2V0X2lkKCksIFBIUF9FT0w7