Upgraded PHP to 5.6.16 and MySQL Extension not working

I was running a very outdated version of PHP version 5.3.3. So I updated it to 5.6.16. However since I’ve updated I am getting the following error when I try to view my WordPress site:

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

I understand that the reason for this error is because the mysql extension is not being loaded by PHP but I am unsure as to what to do to get this? I’ve checked my php.ini file and uncommented this line

extension=msql.so

restarted my apache server and no luck!

The Code I am using to check if it is enabled is:

if (extension_loaded('mysql') or extension_loaded('mysqli')) {
            echo "Loaded";
        }else{
            echo "Not Loaded";
        }

when I run php -m in my terminal I see mysql is not listed.
Could anyone help me out with getting this to work.

I’ve also tried running this command yum install php-mysql but I get this error:

Finished Dependency Resolution
Error: php56w-common conflicts with php-common-5.3.3-46.el6_6.i686
 You could try using --skip-broken to work around the problem
 You could try running: rpm -Va --nofiles --nodigest

Thanks