// TODO: change error reporting to E_ALL, including E_NOTICE to detect subtle bugs?
error_reporting(E_ALL & ~E_NOTICE);
// TODO: if display_errors is set to 0... who will ever see errors?
ini_set("display_errors", "0");
if (@ini_get('register_globals')) {
    if (isset($_REQUEST['GLOBALS']) || isset($_FILES['GLOBALS'])) {
        die('GLOBALS overwrite attempt detected. Please consider turning register_globals off.');
    }
    // Collect and unset all registered variables from globals.
    $_txpg = array_merge(
        isset($_SESSION) ? (array) $_SESSION : array(),
        (array) $_ENV,
        (array) $_GET,
        (array) $_POST,
        (array) $_COOKIE,
        (array) $_FILES,
        (array) $_SERVER
    );
    // As the deliberate awkwardly-named local variable $_txpfoo MUST NOT be
    // unset to avoid notices further down, we must remove any potential
    // identically-named global from the list of global names here.
    unset($_txpg['_txpfoo']);
    foreach ($_txpg as $_txpfoo => $value) {
        if (!in_array($_txpfoo, array(
            'GLOBALS',
            '_SERVER',
            '_GET',
            '_POST',
            '_FILES',
            '_COOKIE',
            '_SESSION',
            '_REQUEST',
            '_ENV',
        ))) {
            unset($GLOBALS[$_txpfoo], $$_txpfoo);
        }
    }
}