SNMP::walk

(PHP 5 >= 5.4.0, PHP 7)

SNMP::walk — Fetch SNMP object subtree

Descrierea

public SNMP::walk ( string $object_id [, bool $suffix_as_key = FALSE [, int $max_repetitions [, int $non_repeaters ]]] ) : array

SNMP::walk() is used to read SNMP subtree rooted at specified object_id.

Parametri

object_id

Root of subtree to be fetched

suffix_as_key

By default full OID notation is used for keys in output array. If set to TRUE subtree prefix will be removed from keys leaving only suffix of object_id.

non_repeaters

This specifies the number of supplied variables that should not be iterated over. The default is to use this value from SNMP object.

max_repetitions

This specifies the maximum number of iterations over the repeating variables. The default is to use this value from SNMP object.

Valorile întoarse

Returns an associative array of the SNMP object ids and their values on success or FALSE on error. When a SNMP error occures SNMP::getErrno() and SNMP::getError() can be used for retrieving error number (specific to SNMP extension, see class constants) and error message respectively.

Erori/Excepții

Această metodă nu emite careva excepții în mod implicit. Pentru a activa emiterea unei excepții SNMPException când au loc erori în bibliotecă trebuie stabilită o valoare corespunzătoare a parametrului clasei SNMP exceptions_enabled. Vedeți explicația SNMP::$exceptions_enabled pentru mai multe detalii.

Exemple

Example #1 SNMP::walk() example

<?php
  $session = new SNMP(SNMP::VERSION_1, "127.0.0.1", "public");
  $fulltree = $session->walk(".");
  print_r($fulltree);
  $session->close();
?>

Exemplul de mai sus va afișa ceva similar cu:

Array
(
    [SNMPv2-MIB::sysDescr.0] => STRING: Test server
    [SNMPv2-MIB::sysObjectID.0] => OID: NET-SNMP-MIB::netSnmpAgentOIDs.8
    [DISMAN-EVENT-MIB::sysUpTimeInstance] => Timeticks: (1150681750) 133 days, 4:20:17.50
    [SNMPv2-MIB::sysContact.0] => STRING: Nobody
    [SNMPv2-MIB::sysName.0] => STRING: server.localdomain
    ...
)

Example #2 suffix_as_key example

suffix_as_key may be used when merging multiple SNMP subtrees into one. This example maps interface names to their type.

<?php
  $session = new SNMP(SNMP::VERSION_1, "127.0.0.1", "public");
  $session->valueretrieval = SNMP_VALUE_PLAIN;
  $ifDescr = $session->walk(".1.3.6.1.2.1.2.2.1.2", TRUE);
  $session->valueretrieval = SNMP_VALUE_LIBRARY;
  $ifType = $session->walk(".1.3.6.1.2.1.2.2.1.3", TRUE);
  print_r($ifDescr);
  print_r($ifType);
  $result = array();
  foreach($ifDescr as $i => $n) {
    $result[$n] = $ifType[$i];
  }
  print_r($result);
?>

Exemplul de mai sus va afișa ceva similar cu:

Array
(
    [1] => igb0
    [2] => igb1
    [3] => ipfw0
    [4] => lo0
    [5] => lagg0
)
Array
(
    [1] => INTEGER: ieee8023adLag(161)
    [2] => INTEGER: ieee8023adLag(161)
    [3] => INTEGER: ethernetCsmacd(6)
    [4] => INTEGER: softwareLoopback(24)
    [5] => INTEGER: ethernetCsmacd(6)
)
Array
(
    [igb0] => INTEGER: ieee8023adLag(161)
    [igb1] => INTEGER: ieee8023adLag(161)
    [ipfw0] => INTEGER: ethernetCsmacd(6)
    [lo0] => INTEGER: softwareLoopback(24)
    [lagg0] => INTEGER: ethernetCsmacd(6)
)

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