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SNMP::walk

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

SNMP::walkFetch SNMP object subtree

说明

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

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

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