- var_dump: documentation ( source)
- error_reporting: documentation ( source)
<?php
error_reporting(E_ALL);
$GLOBALS = 'miauw';
$_SERVER = [1, 1, 2, 3, 5, 8, 13, 21, 34, 55];
function miauw() {
var_dump($_SERVER, $GLOBALS, $GLOBALS['_SERVER']);
}
miauw();