如何使用PHP读取HTTP_REFERER中的Get值

$referer = $_SERVER['HTTP_REFERER'];

if ($referer) {
    $urlParts = parse_url($referer);
    if (isset($urlParts['query'])) {
        parse_str($urlParts['query'], $query);
        $getParamValue = $query['getParamName']; // 替换getParamName为实际的GET参数名
        echo "GET参数的值为：" . $getParamValue;
    } else {
        echo "HTTP_REFERER中没有GET参数";
    }
} else {
    echo "HTTP_REFERER为空";
}