(PHP 5 >= 5.4.0, PHP 7, PHP 8)
SNMP::walk — Fetch SNMP object subtree
$objectId,$suffixAsKey = false,$maxRepetitions = -1,$nonRepeaters = -1
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.
This method does not throw any exceptions by default.
To enable throwing an SNMPException exception when some of library errors occur
the SNMP class parameter exceptions_enabled
should be set to a corresponding value. See
SNMP::$exceptions_enabled explanation for more details.
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();
?>Il precedente esempio visualizzerà qualcosa simile a:
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);
?>Il precedente esempio visualizzerà qualcosa simile a:
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)
)