SNMP::__construct
Creates SNMP instance representing session to remote SNMP agent
Description
public SNMP::__construct
( int $version
, string $hostname
, string $community
[, int $timeout = 1000000
[, int $retries = 5
]] )
Parameters
-
version
-
SNMP protocol version:
SNMP::VERSION_1,
SNMP::VERSION_2C,
SNMP::VERSION_3.
-
hostname
-
The SNMP agent. hostname may be suffixed with
optional SNMP agent port after colon. IPv6 addresses must be enclosed in square
brackets if used with port. If FQDN is used for hostname
it will be resolved by php-snmp library, not by Net-SNMP engine. Usage
of IPv6 addresses when specifying FQDN may be forced by enclosing FQDN
into square brackets. Here it is some examples:
| IPv4 with default port | 127.0.0.1 |
| IPv6 with default port | ::1 or [::1] |
| IPv4 with specific port | 127.0.0.1:1161 |
| IPv6 with specific port | [::1]:1161 |
| FQDN with default port | host.domain |
| FQDN with specific port | host.domain:1161 |
| FQDN with default port, force usage of IPv6 address | [host.domain] |
| FQDN with specific port, force usage of IPv6 address | [host.domain]:1161 |
-
community
-
The purpuse of community is
SNMP version specific:
| SNMP::VERSION_1 | SNMP community |
| SNMP::VERSION_2C | SNMP community |
| SNMP::VERSION_3 | SNMPv3 securityName |
-
timeout
-
The number of microseconds until the first timeout.
-
retries
-
The number of retries in case timeout occurs.
Return Values
Returns SNMP object representing remote SNMP agent.
Errors/Exceptions
SNMP::__construct throws an exception when
parameters count or types are wrong or unknown SNMP
protocol version specified.
Examples
Example #1 Fetching sysLocation
<?php
$session = new SNMP(SNMP::VERSION_1, "127.0.0.1", "public");
$sysdescr = $session->get("sysDescr.0");
echo "$sysdescr\n";
?>
The above example will output
something similar to: