title: PHP Startup: Unable to load dynamic library 'pdo_mysql.so'
body: <p>When I type <code>php -v</code> on the command line, I get the following error. 
  I tried reinstalling php, but there is no change in the error.</p>
  
  <p><a href="https://i.stack.imgur.com/v5buS.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/v5buS.png" alt=""></a></p>
  
  <p>How can I fix it?</p>