title: PHP: How to exec 'svn up' in Linux
body: <p>I want to  visit a  url via <a href="http://xxxxx.php" rel="nofollow">http://xxxxx.php</a> then my server will update automatically</p>
  
  <p>I try to many way to use php execute "svn update" on my server Like:</p>
  
  <pre><code>system('./svn.sh', $retval);   //svn.sh contain svn up ....
  system('svn up .', $retval);
  system('/usr/bin/svn up --username xxx --password --- /my_path', $retval);
  </code></pre>
  
  <p>PS :I don not want to use third party php extension for subversion
  Thanks !!!</p>