title: The session id is too long or contains illegal characters, valid characters are a-z, A-Z, 0-9 and '-,'
body: <p>How to solve :</p>
  <blockquote>
  <p>Warning: session_start() [function.session-start]: The session id is too long or contains illegal characters, valid characters are a-z, A-Z, 0-9 and '-,' in .....  on line 3</p>
  <p>Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at ......:3) in ..... on line 3</p>
  <p>Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at .....:3) in ..... on line 3</p>
  </blockquote>