copied from https://github.com/gnuboard/gnuboard5/blob/master/lib/common.lib.php

goto.php

<?php
// 메타태그를 이용한 URL 이동
// header("location:URL") 을 대체
function goto_url($url)
{
    $url = str_replace("&amp;", "&", $url);
    //echo "<script> location.replace('$url'); </script>";
    if (!headers_sent())
        header('Location: '.$url);
    else {
        echo '<script>';
        echo 'location.replace("'.$url.'");';
        echo '</script>';
        echo '<noscript>';
        echo '<meta http-equiv="refresh" content="0;url='.$url.'" />';
        echo '</noscript>';
    }
    exit;
}