CXLVII. SNMP Functions

Introduction

Requirements

In order to use the SNMP functions on Unix you need to install the NET-SNMP package. On Windows these functions are only available on NT and not on Win95/98.

Installation

Important: In order to use the UCD SNMP package, you need to define NO_ZEROLENGTH_COMMUNITY to 1 before compiling it. After configuring UCD SNMP, edit config.h or acconfig.h and search for NO_ZEROLENGTH_COMMUNITY. Uncomment the #define line. It should look like this afterwards:
#define NO_ZEROLENGTH_COMMUNITY 1
Now compile PHP --with-snmp[=DIR].

If you see strange segmentation faults in combination with SNMP commands, you did not follow the above instructions. If you do not want to recompile UCD SNMP, you can compile PHP with the --enable-ucd-snmp-hack switch which will work around the misfeature.

The Windows distribution contains support files for SNMP in the mibs directory. This directory should be moved to DRIVE:\usr\mibs, where DRIVE must be replaced with the driveletter where PHP is installed on, e.g.c:\usr\mibs.

Runtime Configuration

This extension has no configuration directives defined in php.ini.

Resource Types

Predefined Constants

The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.

SNMP_OID_OUTPUT_FULL (integer): As of 5.2.0
SNMP_OID_OUTPUT_NUMERIC (integer): As of 5.2.0
SNMP_VALUE_LIBRARY (integer)
SNMP_VALUE_PLAIN (integer)
SNMP_VALUE_OBJECT (integer)
SNMP_BIT_STR (integer)
SNMP_OCTET_STR (integer)
SNMP_OPAQUE (integer)
SNMP_NULL (integer)
SNMP_OBJECT_ID (integer)
SNMP_IPADDRESS (integer)
SNMP_COUNTER (integer)
SNMP_UNSIGNED (integer)
SNMP_TIMETICKS (integer)
SNMP_UINTEGER (integer)
SNMP_INTEGER (integer)
SNMP_COUNTER64 (integer)

Table of Contents
snmp_get_quick_print -- Fetches the current value of the UCD library's quick_print setting
snmp_get_valueretrieval -- Return the method how the SNMP values will be returned
snmp_read_mib -- Reads and parses a MIB file into the active MIB tree
snmp_set_enum_print -- Return all values that are enums with their enum value instead of the raw integer
snmp_set_oid_numeric_print -- Return all objects including their respective object id within the specified one
snmp_set_oid_output_format -- Set the OID output format
snmp_set_quick_print -- Set the value of quick_print within the UCD SNMP library
snmp_set_valueretrieval -- Specify the method how the SNMP values will be returned
snmpget -- Fetch an SNMP object
snmpgetnext -- Fetch a SNMP object
snmprealwalk -- Return all objects including their respective object ID within the specified one
snmpset -- Set an SNMP object
snmpwalk -- Fetch all the SNMP objects from an agent
snmpwalkoid -- Query for a tree of information about a network entity


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