Question

我确实安装了php7.4-mysql，错误在下面，其余在标题中

PHP致命错误：未捕获的错误：在{long_path} /index.php:9\nStack trace：\ n＃0 {main} \ n中找不到类'mysqli'，在线上{long_path} /index.php中9

是否有解决方案，还是必须重新安装并重新配置所有内容（这意味着我将通过备份再次降级到Ubuntu 18.04）？

Answer 1

今天更新后，我遇到了同样的问题。我发现有些东西弄乱了，所以我尝试将其删除

apt remove php-mysqli
Reading package lists... Done
Building dependency tree
Reading state information... Done
Note, selecting 'php7.4-mysql' instead of 'php-mysqli'
0 upgraded, 0 newly installed, 0 to remove and 19 not upgraded.

然后我尝试进行清除，并安装完全相同的结果。

最后，apt-get dist-upgrade解决了我的问题。

您可以看到我的系统离开的升级处于一种奇怪状态，尚未完全清除。

apt-get dist-upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following packages were automatically installed and are no longer required:
  apt-show-versions libapt-pkg-perl libauthen-pam-perl libimagequant0 libio-pty-perl libnet-ssleay-perl libpython-all-dev libpython2-dev
  libpython2.7-dev libwebpdemux2 perl-openssl-defaults python-all python-all-dev python-automat python-certifi python-configparser python-constantly
  python-crypto python-dbus python-entrypoints python-gi python-hyperlink python-keyring python-olefile python-pil python-xdg python2-dev python2.7-dev
  python3-scour scour
Use 'apt autoremove' to remove them.
The following packages will be REMOVED:
  libapache2-mod-php7.2 libapache2-mod-php7.3 libpcre2-posix0 libpython-dev libpython-stdlib minecraft-overviewer php7.2 php7.3 python python-click
  python-colorama python-configobj python-dev python-incremental python-keyrings.alt python-minimal python-pip python-requests python-scour
  python-secretstorage python-serial python-twisted-bin python-twisted-core python-urllib3 python-wheel webmin
The following NEW packages will be installed:
  libapache2-mod-php7.4 libpcre2-posix2 php7.4
The following packages have been kept back:
  libomp-dev
The following packages will be upgraded:
  libapache2-mod-php libpcre2-16-0 libpcre2-32-0 libpcre2-8-0 libpcre2-dev libpython-all-dev libpython2-dev libpython2-stdlib php python-all
  python-all-dev python-pip-whl python2 python2-dev python2-minimal python3-pip
16 upgraded, 3 newly installed, 26 to remove and 1 not upgraded.
Need to get 2,675 kB/4,704 kB of archives.
After this operation, 196 MB disk space will be freed.
Do you want to continue? [Y/n] y

此后，我刷新了页面，它再次正常工作。

希望这会有所帮助，而且您并不孤单。

Answer 2

将 php 升级到 7.4 对我有用。

sudo apt-get install php7.4

升级到Ubuntu 20.04后，PHP MySQLi不再起作用

2 个答案: