SNMP Functions

In order to use the SNMP functions on Unix you need to install the ucd-snmp package. There is a link to the current version in the PHP FAQ. On Windows these functions are only available on NT and not on Win95/98.

SNMP Functions

snmpget

Name

snmpget — Fetch an SNMP object

Description

int snmpget(string hostname, string community, string object_id);

Returns SNMP object value on success and false on error.

The snmpget() function is used to read the value of an SNMP object specified by the object_id. SNMP agent is specified by the hostname and the read community is specified by the community parameter.

snmpget("127.0.0.1", "public", "system.SysContact.0")

snmpwalk

Name

snmpwalk — Fetch all the SNMP objects from an agent

Description

array snmpwalk(string hostname, string community, string object_id);

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

snmpwalk() function is used to read all the values from an SNMP agent specified by the hostname. Community specifies the read community for that agent. A 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.

$a = snmpwalk("127.0.0.1", "public", "");

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

for($i=0; $i<count($a); $i++) { echo $a[$i];

}

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