title: how to redirect a bunch of files with htaccess
body: <p>I have a site with a lot of url's like this </p>
  
  <pre><code>www.example.com/this_has_some_meaning.php
  </code></pre>
  
  <p>Now I learned that for SEO reasons it is better to use</p>
  
  <pre><code>www.example.com/this-has-some-meaning.php
  </code></pre>
  
  <p>Can i,  using htaccess,  redirect all the url's from the old to the new, using some kind of regex? </p>