snmpwalkoid

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

    snmpwalkoid — Query for a tree of information about a network entity

    Description

    snmpwalkoid(
        string $hostname,
        string $community,
        array|string $object_id,
        int $timeout = -1,
        int $retries = -1
    ): array|false

    snmpwalkoid() function is used to read all object ids and their respective values from an SNMP agent specified by hostname.

    The existence of snmpwalkoid() and snmpwalk() has historical reasons. Both functions are provided for backward compatibility. Use snmprealwalk() instead.

    Parameters

    hostname

    The SNMP agent.

    community

    The read community.

    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 associative array with object ids and their respective object value starting from the object_id as root or false on error.

    Examples

    Example #1 snmpwalkoid() Example

    <?php
    $a     = snmpwalkoid("127.0.0.1", "public", "");
    for (    reset($a); $i = key($a); next($a)) {
    echo     "$i: $a[$i]<br />\n";
    }
    ?>

    Above function call would return all the SNMP objects from the SNMP agent running on localhost. One can step through the values with a loop

    See Also

    • snmpwalk() - Fetch all the SNMP objects from an agent

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    User Contributed Notes 4 notes

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    0
    Anonymous
    9 years ago
    make sure you install "snmp-mibs-downloader" in debian.

    apt-get install snmp-mibs-downloader

    you my also need to edit your /etc/apt/sources.list

    deb http://ftp.us.debian.org/debian/ wheezy main contrib non-free
    deb-src http://ftp.us.debian.org/debian/ wheezy main contrib non-free
    up
    0
    thammer at rtccom dot com
    19 years ago
    The above note mentions that the MAC addresses come back converted to integers or something funky like that. Not sure why that is happening but I fixed that with a wrapper function.

    function PadMAC($mac) {
    $mac_arr = explode(':',$mac);
    foreach($mac_arr as $atom) {
    $atom = trim($atom);
    $newarr[] = sprintf("%02s",$atom);
    }
    $newmac = implode(':',$newarr);
    return $newmac;
    }

    Maybe that will help somebody with that issue. I know I personally use the heck out of these user contributed notes
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    0
    gene_wood at example dot com
    19 years ago
    Looks like timeout is in MICRO seconds.
    1,000,000 &micros = 1 s
    up
    0
    jasper at pointless dot net
    23 years ago
    N.B. it's possible for snmpwalkoid to lose data - the "rmon.matrix.matrixSDTable" table for example uses binary mac addresses as part of the index, these get converted to ascii, and by the time they get to php they can be non-unique - so some entrys in the table get lost...
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