对php8.0+兼容有问题

[Seagull-Y]

报错：
Deprecated: preg_replace_callback(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /www/wwwroot/xxxxxx.net/usr/plugins/TypechoCosPlugin/Plugin.php on line 559

问了下chatgpt，这一段改成这样就不报错了：

public static function refresh_cdn_url($opt, $cosClient, $text)
{
// 确保 $text 是一个字符串
$text = $text ?? '';

$text = preg_replace_callback(
    '/https?:\/\/[-A-Za-z0-9+&@#\/\%?=~_|!:,.;]+[-A-Za-z0-9+&@#\/\%=~_|]/i',
    function ($matches) use ($opt, $cosClient) {
        $url = $matches[0];
        if (strpos($url, self::getDomain()) !== false) {
            $expTime = explode('q-key-time%3D', $url);
            if (sizeof($expTime) > 1) {
                @$expTime = explode('%26q', $expTime[1])[0];
                @$expTime = explode('%3B', $expTime)[1];
                // 未过期，不更新
                if ($expTime > time()) {
                    return $url;
                }
            }
            $path = str_replace(self::getDomain(), '', $url);
            $url = $cosClient->getObjectUrl($opt->bucket, explode('?', $path)[0], '+10 minutes');
        }
        return $url;
    },
    $text
);
return $text;

}