Limxyz→趋近未知

function is_ie() {
    $useragent = strtolower($_SERVER['HTTP_USER_AGENT']);
    if ((strpos($useragent, 'opera') !== false) ||
        (strpos($useragent, 'konqueror') !== false)) return false;
    if (strpos($useragent, 'msie ') !== false) return true;
    return false;
}

function download($attachment) {
    $realpath = ABSPATH . UPLOAD_DIR . '/' . $attachment['path'] . '/' . $attachment['savename'];
    $content_len = sprintf("%u", filesize($realpath));
    if (is_ie()) {
        // leave $filename alone so it can be accessed via the hook below as expected.
        $filename = rawurlencode($attachment['filename']);
    }
    else {
        $filename = &$attachment['filename'];
    }

    while(ob_get_length() !== false) @ob_end_clean();
    header('Pragma: public');
    header('Last-Modified: '.gmdate('D, d M Y H:i:s') . ' GMT');
    header('Cache-Control: no-store, no-cache, must-revalidate');
    header('Cache-Control: pre-check=0, post-check=0, max-age=0');
    header('Content-Transfer-Encoding: binary');
    header('Content-Encoding: none');
    header('Content-type: ' . $attachment['type']);
    header('Content-Disposition: attachment; filename="' . $filename . '"');
    header("Content-length: $content_len");
    echo file_get_contents($realpath);
    exit();
}