SNMP::walk

(PHP 5 >= 5.4.0, PHP 7, PHP 8)

SNMP::walk — Fetch SNMP object subtree

说明

public SNMP::walk(
    array|string $objectId,
    bool $suffixAsKey = false,
    int $maxRepetitions = -1,
    int $nonRepeaters = -1
): array|false

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

参数

objectId: Root of subtree to be fetched
suffixAsKey: 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.
nonRepeaters: This specifies the number of supplied variables that should not be iterated over. The default is to use this value from SNMP object.
maxRepetitions: This specifies the maximum number of iterations over the repeating variables. The default is to use this value from SNMP object.

返回值

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.

错误／异常

本方法默认不抛出任何异常。如果要在某些库出错时抛出 SNMPException 异常，用户需要将 SNMP 类参数 exceptions_enabled 设定为相应的值。更多细节见 SNMP::$exceptions_enabled 的解释。

范例

示例 #1 SNMP::walk() example


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

以上例程的输出类似于：

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
    ...
)

示例 #2 suffixAsKey example

suffixAsKey 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);
?>

以上例程的输出类似于：

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)
)

参见

SNMP::getErrno() - Get last error code
SNMP::getError() - Get last error message

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官方地址：https://www.php.net/manual/en/snmp.walk.php

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SNMP::walk

说明

参数

返回值

错误／异常

范例

参见

User Contributed Notes