安装3.4最新版，提示这个是什么意思？
2020/12/06 12:14:15
Deprecated: Array and string offset access syntax with curly braces is deprecated in /www/wwwroot/9x/install/index.php on line 324
用的宝塔面板，php7.4
mysql5.7
用的宝塔面板，php7.4
mysql5.7