PHP Manual
SNMP Functions
Fetch all the SNMP objects from an agent

snmp3_walk

(PHP 4, PHP 5, PHP 7, PHP 8)

snmp3_walk — Fetch all the SNMP objects from an agent

Description

snmp3_walk(
    string $hostname,
    string $security_name,
    string $security_level,
    string $auth_protocol,
    string $auth_passphrase,
    string $privacy_protocol,
    string $privacy_passphrase,
    array|string $object_id,
    int $timeout = -1,
    int $retries = -1
): array|false

snmp3_walk() function is used to read all the values from an SNMP agent specified by the hostname.

Even if the security level does not use an auth or priv protocol/password valid values have to be specified.

Parameters

hostname: The hostname of the SNMP agent (server).
security_name: the security name, usually some kind of username
security_level: the security level (noAuthNoPriv|authNoPriv|authPriv)
auth_protocol: the authentication protocol ("MD5", "SHA", "SHA256", or "SHA512")
auth_passphrase: the authentication pass phrase
privacy_protocol: the privacy protocol (DES or AES)
privacy_passphrase: the privacy pass phrase
object_id: If null, object_id is taken as the root of the SNMP objects tree and all objects under that tree are returned as an array. If object_id is specified, all the SNMP objects below that object_id are returned.
timeout: The number of microseconds until the first timeout.
retries: The number of times to retry if timeouts occur.

Return Values

Returns an array of SNMP object values starting from the object_id as root or false on error.

Changelog

Version	Description
8.1.0	The `auth_protocol` now accepts `"SHA256"` and `"SHA512"` when supported by libnetsnmp.

Examples

Example #1 snmp3_walk() Example

<?php
$ret = snmp3_walk('localhost', 'james', 'authPriv', 'SHA', 'secret007', 'AES', 'secret007', 'IF-MIB::ifName');
var_export($ret);
?>

Above function call would return all the SNMP objects from the SNMP agent running on localhost:

array (
  0 => 'STRING: lo',
  1 => 'STRING: eth0',
  2 => 'STRING: eth2',
  3 => 'STRING: sit0',
  4 => 'STRING: sixxs',
)