(PHP 5 >= 5.4.0)
SNMP::walk — Fetch SNMP object subtree
$object_id
[, bool $suffix_as_key = FALSE
[, int $max_repetitions
[, int $non_repeaters
]]] )
SNMP::walk() is used to read SNMP subtree rooted at specified object_id.
object_id
Root of subtree to be fetched
suffix_as_key
By default full OID notation is used for keys in output array.
If set to TRUE subtree prefix will be removed from keys leaving only suffix of object_id.
non_repeaters
This specifies the number of supplied variables that should not be iterated over. The default is to use this value from SNMP object.
max_repetitions
This specifies the maximum number of iterations over the repeating variables. The default is to use this value from SNMP object.
Returns an associative array of the SNMP object ids and their values on success or FALSE on error.
When a SNMP error occures SNMP::getErrno() and
SNMP::getError() can be used for retrieving error
number (specific to SNMP extension, see class constants) and error message
respectively.
This method do not throw any exceptions by default.
To enable throwing an SNMPException exception when some of library errors occure
user should set exceptions_enabled
SNMP class parameter to corresponding value. See
SNMP::$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();
?>
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 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);
?>
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)
)