You need a consumer key and secret to test the sample code. Get one from <a href="https://dev.twitter.com/apps">dev.twitter.com/apps</a><br />
<b>Warning</b>:  Unknown: open(/var/www/html/data/session/sess_5c469073cb939afb034aff3baf0fe12f, O_RDWR) failed: Permission denied (13) in <b>Unknown</b> on line <b>0</b><br />
<br />
<b>Warning</b>:  Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/var/www/html/data/session) in <b>Unknown</b> on line <b>0</b><br />