title: Compatibility of PHP 7.4.21 with MySQL 8.x
body: <p>I plan upgrade my MySQL to version 8.x and just find this article: <a href="https://www.ma-no.org/en/networking/databases/mysql-8-0-is-now-fully-supported-in-php-7-4" rel="nofollow noreferrer">https://www.ma-no.org/en/networking/databases/mysql-8-0-is-now-fully-supported-in-php-7-4</a></p>
  <p>Based on its description, auth_plugin_caching_sha2_password is supported in PHP 7.4.21 and I just checked my instance and confirm this.</p>
  <p>However, it seems that there is another issue with mysqli.so. I don't know what it is for. But it seems that I need to modify php.ini to make it work. Is that true?</p>
  <p>So before I perform upgrade, need I modify php.ini based on the above article?</p>