title: When moving a folder in the server, correct all links
body: <p>Lets say I have this folder on my server called books.</p>
  
  <p>Inside I have and index.php with this links:
  books/book1.php
  books/book2.php</p>
  
  <p>I then decide to create a subdirectory called "scifi", for a better sorting of the books.</p>
  
  <p>So the books are no in:
  books/scifi/book1.php
  books/scifi/book2.php</p>
  
  <p>The links have changed and now the links on index.php dont work.</p>
  
  <p>How can I (or redirect*) all the links without having to go one by one.</p>
  
  <p>*please dont be thrown away by redirect I do not mean it in the programming way (necessarily) rather in an illustrative one.</p>