string snmpget(string hostname, string community, string object_id, int [timeout], int [retries]);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.
$syscontact = snmpget("127.0.0.1", "public", "system.SysContact.0")