title: cleanup php session files
body: <p>On  my website I use PHP sessions. Session information is stored in files in my ./session path. After a few months I discovered that these session files are never deleted, by now there are 145.000 of them in this directory. </p>
  
  <p>How should these be cleaned up? Do I have to do it programmatically, or is ther a setting I can use somewhere that would have this cleanup happen automatically?</p>
  
  <p><strong>EDIT</strong> forgot to mention: This site runs at a provider, so I don't have access to a command line.  I do have ftp-access, but the session files belong to another user (the one the webserver proces runs I guess) From the first answers I got I think it's not just a setting on the server or PHP, so I guess I'll have to implement something for it in PHP, and call that periodically from a browser (maybe from a cron job running on my own machine at home)</p>