I just upgraded my phpversion from php 7.1 to 7.3. Unfortunately I can't seem to get mysql working. I'm on a centos 7 box using yum package manager. These are my installed php packages. I've rebooted and tried uninstalling, reinstalling the mysql extension and it still won't show up in the phpinfo. The only mention of mysql is in the credits section.
php73.x86_64 2.0-1.el7.remi @remi-safe
php73-common.x86_64 7.3.28-1.el7.ius @ius
php73-json.x86_64 7.3.28-1.el7.ius @ius
php73-mbstring.x86_64 7.3.28-1.el7.ius @ius
php73-pdo.x86_64 7.3.28-1.el7.ius @ius
php73-pdo-dblib.x86_64 7.3.28-1.el7.ius @ius
php73-php-cli.x86_64 7.3.28-1.el7.remi @remi-safe
php73-php-common.x86_64 7.3.28-1.el7.remi @remi-safe
php73-php-json.x86_64 7.3.28-1.el7.remi @remi-safe
php73-php-mysqlnd.x86_64 7.3.28-1.el7.remi @remi-safe
php73-php-pdo.x86_64 7.3.28-1.el7.remi @remi-safe
php73-php-pear.noarch 1:1.10.12-7.el7.remi @remi-safe
php73-php-pecl-mcrypt.x86_64 1.0.4-1.el7.remi @remi-safe
php73-php-pecl-mysql.x86_64 1.0.0-0.20.20180226.647c933.el7.remi @remi-safe
php73-php-pecl-xdebug3.x86_64 3.0.4-1.el7.remi @remi-safe
php73-php-process.x86_64 7.3.28-1.el7.remi @remi-safe
php73-php-soap.x86_64 7.3.28-1.el7.remi @remi-safe
php73-php-xml.x86_64 7.3.28-1.el7.remi @remi-safe
php73-runtime.x86_64 2.0-1.el7.remi @remi-safe