public static function emojiHandle(string $content)
    {
        // 微信的坑
        $content = str_replace('<span class="emoji emoji1f450"></span', '<span class="emoji emoji1f450"></span>', $content);
        preg_match_all('/<span class="emoji emoji(.{1,10})"><\/span>/', $content, $match);

        foreach ($match[1] as &$unicode) {
            $unicode = array_get(self::EMOJI_MAP, $unicode, $unicode);
            $unicode = html_entity_decode("&#x{$unicode};");
        }

        return str_replace($match[0], $match[1], $content);
    }