PHP Conference Nagoya 2025

    snmp_set_valueretrieval

    (PHP 4 >= 4.3.3, PHP 5, PHP 7, PHP 8)

    snmp_set_valueretrieval — Specify the method how the SNMP values will be returned

    Description

    snmp_set_valueretrieval(int $method): true

    Parameters

    method
    types
    SNMP_VALUE_LIBRARY The return values will be as returned by the Net-SNMP library.
    SNMP_VALUE_PLAIN The return values will be the plain value without the SNMP type information.
    SNMP_VALUE_OBJECT The return values will be objects with the properties value and type, where the latter is one of the SNMP_OCTET_STR, SNMP_COUNTER etc. constants. The way value is returned is based on which one of constants SNMP_VALUE_LIBRARY, SNMP_VALUE_PLAIN is set.

    Return Values

    Always returns true.

    Changelog

    Version Description
    8.2.0 The return type is true now; previously, it was bool.

    Examples

    Example #1 Using snmp_set_valueretrieval()

    <?php
    snmp_set_valueretrieval    (SNMP_VALUE_LIBRARY);
    $ret = snmpget('localhost', 'public', 'IF-MIB::ifName.1');
    // $ret = "STRING: lo"

    snmp_set_valueretrieval(SNMP_VALUE_PLAIN);
    $ret = snmpget('localhost', 'public', 'IF-MIB::ifName.1');
    // $ret = "lo";

    snmp_set_valueretrieval(SNMP_VALUE_OBJECT);
    $ret = snmpget('localhost', 'public', 'IF-MIB::ifName.1');
    // stdClass Object
    // (
    // [type] => 4 <-- SNMP_OCTET_STR, see constants
    // [value] => lo
    // )

    snmp_set_valueretrieval(SNMP_VALUE_OBJECT | SNMP_VALUE_PLAIN);
    $ret = snmpget('localhost', 'public', 'IF-MIB::ifName.1');
    // stdClass Object
    // (
    // [type] => 4 <-- SNMP_OCTET_STR, see constants
    // [value] => lo
    // )

    snmp_set_valueretrieval(SNMP_VALUE_OBJECT | SNMP_VALUE_LIBRARY);
    $ret = snmpget('localhost', 'public', 'IF-MIB::ifName.1');
    // stdClass Object
    // (
    // [type] => 4 <-- SNMP_OCTET_STR, see constants
    // [value] => STRING: lo
    // )

    ?>

    See Also

    Found A Problem?

    Learn How To Improve This Page • Submit a Pull Request • Report a Bug
    ＋add a note

    User Contributed Notes 3 notes

    up
    0
    Mikhail D
    17 years ago
    Sample is swow Interface status.
    (.iso.org.dod.internet.mgmt.mib-2.
    interfaces.ifTable.ifEntry.ifAdminStatus)
    Possible values for this request from MIB:
    Enum(integer): up (1), down (2), testing (3)

    <?php
    //snmp_set_quick_print(0); // is default
    $strIP = "10.1.1.1"; $strComm = "public";
    $strOID = ".1.3.6.1.2.1.2.2.1.7.1";
    echo     "\n Default valueretrieval with snmp_set_quick_print(0)";
    echo     " snmp_get_valueretrieval = SNMP_VALUE_LIBRARY";
    echo     ", retrieved value " . snmpget($strIP, $strComm, $strOID);
    snmp_set_valueretrieval(SNMP_VALUE_LIBRARY);
    echo     "\n SNMP_VALUE_LIBRARY " . snmp_get_valueretrieval();
    echo     ", retrieved value " . snmpget($strIP, $strComm, $strOID);
    snmp_set_valueretrieval(SNMP_VALUE_PLAIN);
    echo     "\n SNMP_VALUE_PLAIN " . snmp_get_valueretrieval();
    echo     ", retrieved value " . snmpget($strIP, $strComm, $strOID);

    snmp_set_quick_print(1);
    echo     "\n Default valueretrieval snmp_set_quick_print(0) " ;
    snmp_set_valueretrieval(SNMP_VALUE_LIBRARY);
    echo     "\n SNMP_VALUE_LIBRARY " . snmp_get_valueretrieval();
    echo     ", retrieved value " . snmpget($strIP, $strComm, $strOID);
    snmp_set_valueretrieval(SNMP_VALUE_PLAIN);
    echo     "\n SNMP_VALUE_PLAIN " . snmp_get_valueretrieval();
    echo     ", retrieved value " . snmpget($strIP, $strComm, $strOID);
    ?>

    Results:
    Default valueretrieval with snmp_set_quick_print(0)
    snmp_get_valueretrieval = SNMP_VALUE_LIBRARY,
    retrieved value up(1)
    SNMP_VALUE_LIBRARY 0, retrieved value up(1)
    SNMP_VALUE_PLAIN 1, retrieved value 1
    Default valueretrieval snmp_set_quick_print(0)
    SNMP_VALUE_LIBRARY 0, retrieved value up
    SNMP_VALUE_PLAIN 1, retrieved value 1
    up
    -1
    doug dot manley at gmail dot com
    15 years ago
    The default value (if this function is not called) is "SNMP_VALUE_LIBRARY", which seems to be SNMP's built-in way of printing things.

    From "snmp.c":
    <code>
    static PHP_GINIT_FUNCTION(snmp)
    {
    snmp_globals->valueretrieval = SNMP_VALUE_LIBRARY;
    }
    </code>

    A mild description of these is:
    SNMP_VALUE_LIBRARY: This is a string similar to:
    "INTEGER: 42"

    SNMP_VALUE_PLAIN: This is a string similar to:
    "42"

    SNMP_VALUE_OBJECT: This is a PHP object like:
    object(
    "type" => SNMP_INTEGER,
    "value" => 42,
    )
    Here, "type" is one of the SNMP_* types that are listed under the "Predefined Constants" page. In addition, types 128, 129, and 130 are error conditions.
    up
    -1
    david at eder dot us
    20 years ago
    It appears that the possible method constants for this function are:

    SNMP_VALUE_LIBRARY
    SNMP_VALUE_PLAIN
    SNMP_VALUE_OBJECT

    If you are harvesting data you probably want SNMP_VALUE_PLAIN.
    ＋add a note
    To Top