- var_dump: documentation ( source)
- array_filter: documentation ( source)
<?php
$a = 1;
unset($a);
var_dump(count($GLOBALS));
var_dump(array_filter($GLOBALS, function($v, $k) {
return !in_array($k, ["GLOBALS", "_SERVER", "_GET", "_POST", "_COOKIE", "argv", "argc"]);
}));