Returns an array of SNMP object values starting from the
object_id as root and FALSE on error.
snmpwalk() function is used to
read all the values from an SNMP agent specified by the hostname. Community specifies the read
community for that agent. A
NULL object_id is
taken as the root of the SNMP objects tree and all objects
under that tree are returned as an array. If object_id is specified, all the SNMP
objects below that
object_id are returned.
Above function call would return all the SNMP objects
from the SNMP agent running on localhost. One can step
through the values with a loop