После удаления папки (я думаю, apache2) у меня проблемы с PHP и LAMP

Когда я захожу в phpmyadmin, он говорит:

The mysqli extension is missing. Please check your PHP configuration. <a href="Documentation.html#faqmysql" target="documentation"><img src="themes/dot.gif" title="Documentation" alt="Documentation" class="icon ic_b_help" /></a>

У меня также был установлен WordPress, он говорит:

Your PHP installation appears to be missing the MySQL extension which is required by WordPress.

Поэтому расширение php mysql не работает, но оно установлено.

root@john:~# sudo apt-get install  php5-mysql
Reading package lists... Done
Building dependency tree    
Reading state information... Done
php5-mysql is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

Я пытался удалить и переустановить его, но у меня были проблемы:

root@john:~# sudo apt-get purge php5-mysql
Reading package lists... Done
Building dependency tree     
Reading state information... Done
The following packages were automatically installed and are no longer required:

  dbconfig-common libdbd-mysql-perl libmcrypt4 mysql-client mysql-client-5.5 mysql-    
client-core-5.5 php5-mcrypt
Use 'apt-get autoremove' to remove them.
The following packages will be REMOVED:

  php5-mysql*

0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
After this operation, 245 kB disk space will be freed.
Do you want to continue [Y/n]? y

(Reading database ... 326631 files and directories currently installed.)
Removing php5-mysql ...
dpkg: error processing php5-mysql (--purge):

 subprocess installed pre-removal script returned error exit status 1

Processing triggers for libapache2-mod-php5 ...

Action 'configtest' failed.

The Apache error log may have more information.

Your apache2 configuration is broken, so we're not restarting it for you.

Errors were encountered while processing:

 php5-mysql

E: Sub-process /usr/bin/dpkg returned an error code (1)

Примечание: все работало нормально, пока я не удалил какую-то папку (возможно, apache2), когда Я попытался установить LAMP снова, у меня проблемы.