Liunx based Azure PHP App service is missing MYSQL Driver

I'm trying to host WordPress website on Azure Linux App service.

I got this error:

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

I searched everywhere but I didn't find how to install the MYSQL driver to Liunx based Azure PHP App service.

What I know that I have to do some changes to an ini file; But I don't know how.

Update

I already tried to install mysql using:

apt-get install php-mysql

I got this error

When I tried:

 yum install php-mysqlnd

I got this error:

Update 2

The command apt-cache search php Shows:

I have resolved this issue.

Go to /usr/local/lib/php/extensions/ cd /usr/local/lib/php/extensions/ then do ls you will find the extensions directory starting with no-debug-non-zts in my case years ago it was no-debug-non-zts-20180731 then go to your .ini file and the extensions:

extension=/usr/local/lib/php/extensions/[replace-wthi-your-extention-directory]/mysqli.so extension=/usr/local/lib/php/extensions/[replace-wthi-your-extention-directory]/pdo_mysql.so extension=/usr/local/lib/php/extensions/[replace-wthi-your-extention-directory]/sockets.so extension=/usr/local/lib/php/extensions/[replace-wthi-your-extention-directory]/pdo.so extension=/usr/local/lib/php/extensions/[replace-wthi-your-extention-directory]/mcrypt.so extension=/usr/local/lib/php/extensions/[replace-wthi-your-extention-directory]/xmlrpc.so

in my case, it was:

extension=/usr/local/lib/php/extensions/no-debug-non-zts-20180731/mysqli.so extension=/usr/local/lib/php/extensions/no-debug-non-zts-20180731/pdo_mysql.so extension=/usr/local/lib/php/extensions/no-debug-non-zts-20180731/sockets.so extension=/usr/local/lib/php/extensions/no-debug-non-zts-20180731/pdo.so extension=/usr/local/lib/php/extensions/no-debug-non-zts-20180731/mcrypt.so extension=/usr/local/lib/php/extensions/no-debug-non-zts-20180731/xmlrpc.so