(PHP 5 >= 5.4.0)
SNMP::close — Close SNMP session
Frees previously allocated SNMP session object.
   Returns TRUE on success or FALSE on failure.
  
Example #1 SNMP::close() example
<?php
  $session = new SNMP(SNMP::VERSION_1, "127.0.0.1", "public");
  # ...
  # get, walk, etc goes here
  # ...
  $session->close();
?>