title: Can PSR-0 class autoloader, load PEAR library?
body: <p>So this is my question, I wrote my own class autoloader that fallows PSR-0 standard. That's easy. Now I have my PHP MVC Frameowrk and I would like to use <strong>Twig</strong>, but Twig fallows PEAR naming standard that use <code>_</code> instead of <code>\</code>.</p>
  
  <p>Now is it true that PSR-0 Autoloaders should also be able to load PEAR libs?
  Since inside those Autoloaders <code>_</code> is transformed into <code>\</code>?
  My loader can't load Twig if I register it, but it may be I made a mistake somewhere.</p>
  
  <p>Should PSR-0 compatible class loader be able to load PEAR libs too?</p>