(PHP 5 >= 5.4.0, PHP 7)
SNMP::close — Close SNMP session
Frees previously allocated SNMP session object.
成功时返回 TRUE， 或者在失败时返回 FALSE。
Example #1 SNMP::close() example
<?php
$session = new SNMP(SNMP::VERSION_1, "127.0.0.1", "public");
# ...
# get, walk, etc goes here
# ...
$session->close();
?>