(PHP 5 >= 5.4.0, PHP 7, PHP 8)
SNMP::walk — Fetch SNMP object subtree
$objectId
, bool $suffixAsKey = false
, int $maxRepetitions = -1
, int $nonRepeaters = -1
) : array|bool
SNMP::walk() is used to read SNMP subtree rooted at specified objectId.
objectIdRoot of subtree to be fetched
suffixAsKey
By default full OID notation is used for keys in output array.
If set to true subtree prefix will be removed from keys leaving only suffix of object_id.
nonRepeatersThis specifies the number of supplied variables that should not be iterated over. The default is to use this value from SNMP object.
maxRepetitionsThis specifies the maximum number of iterations over the repeating variables. The default is to use this value from SNMP object.
Returns an associative array of the SNMP object ids and their values on success or false on error.
When a SNMP error occures SNMP::getErrno() and
SNMP::getError() can be used for retrieving error
number (specific to SNMP extension, see class constants) and error message
respectively.
本方法默认不抛出任何异常。如果要在某些库出错时抛出 SNMPException
异常，用户需要将 SNMP 类参数 exceptions_enabled
设定为相应的值。更多细节见
SNMP::$exceptions_enabled 的解释。
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();
?>
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
...
)
Example #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)
)