syntax error, unexpected '') ; return false;">打印</bu' (T_CONSTANT_ENCAPSED_STRING)

    $_html .= '</td>';
} else {
    // 复杂文件名情况，传入完整相对路径，显示文本为空
    $matched_files = glob($upload_dir . '*' . $auction_id . '*.pdf');
    if (!empty($matched_files)) {
        $relative_path = str_replace('/www/wwwroot/riya', '', $matched_files[0]);
        $_html .= '<td>';
        $_html .= '<div style="display: flex; align-items: center; gap: 20px;">';
        $_html .= '<a href="' . $relative_path . '" target="_blank">同捆</a>';
        $_html .= '<button onclick="printFile(' . json_encode($relative_path) . ', '') ; return false;">打印</button>';
        $_html .= '</div>';
        $_html .= '</td>';
    } else {
        $_html .= '<td><span style="color: red;">文件不存在</span></td>';
    }
}
            
$_html .= <<<JS
<script>