The SNMP class

Hopefully this helps someone else out because this was driving be bonkers for a good two hours.  It looks like valueretrieval and enum_print work together in a way that I wasn't expecting, and after re-reading may be by design but I'm not sure.  If you can't get enums to print, this might be why.<?php $snmp = new SNMP(SNMP::VERSION_2C,'192.168.1.9','test'); $snmp->oid_output_format = SNMP_OID_OUTPUT_SUFFIX; $snmp->valueretrieval = SNMP_VALUE_PLAIN; $snmp->enum_print = 0; echo $snmp->get('IF-MIB::ifOperStatus.10110') . "\n"; $snmp->enum_print = 1; echo $snmp->get('IF-MIB::ifOperStatus.10110') . "\n"; $snmp->quick_print = 1; echo $snmp->get('IF-MIB::ifOperStatus.10110') . "\n"; $snmp->valueretrieval = SNMP_VALUE_LIBRARY; echo $snmp->get('IF-MIB::ifOperStatus.10110') . "\n"; $snmp->enum_print = 0; echo $snmp->get('IF-MIB::ifOperStatus.10110') . "\n";?>Output:1111up

Part of my diploma thesis was to create web interface to command device via SNMP. So I create my own level of abstraction over SNMP class:<?php/** * Snmp library which add one level of abstraction to snmp native library. * It adds functionality to work with module PicoIP.With this library you can: * 1.Activate/deactive defined pin; * 2.Get status of all pins. *  * When make an instance you should pass to the constructor key word which will * make the library create an object with necessary properetis and access permissions. *  * Private properties set some of configurations: * Host is IP address of the divece which we will command. * Two passwords are set for reading and writing. * Version of snmp protocol that we will use is version 1. *  * @author Radoslav Madjev * @year 2016 * @version 1.0 beta *  *  */class snmp_lib {    private $snmpInstance;    private $VERSION = SNMP::VERSION_1;    private $HOST = '192.168.0.150';    private $passwordRead = '000000000000';    private $passwordWrite = 'private';    private $releys = array(1 => '1.3.6.1.4.1.19865.1.2.1.1.0',        2 => '1.3.6.1.4.1.19865.1.2.1.2.0');    private $allPorts = array('3' => '1.3.6.1.4.1.19865.1.2.1.33.0',        '5' => '1.3.6.1.4.1.19865.1.2.2.33.0');    /**     * Create instance of SNMP native class, based on actions that we will     * perform.     *      * @param string $action     */    public function __construct($action) {        if (in_array($action, array('read', 'write'))) {            if (strcmp($action, 'read') === 0) {                $this->_read();            } else {                $this->_write();            }        }    }    /**     * Create instance with reading permissions.     */    private function _read() {        $this->snmpInstance = new SNMP($this->VERSION, $this->HOST, $this->passwordRead);    }    /**     * Create instance with writing permissions.     */    private function _write() {        $this->snmpInstance = new SNMP($this->VERSION, $this->HOST, $this->passwordWrite);    }    /**     * Close snmp session.     *      * @return boolean     */    public function closeSession() {        return $this->snmpInstance->close();    }    /**     * Set integer 1 as value of defined pin.     */    public function activate($relay) {        $this->snmpInstance->set($this->releys[$relay], 'i', '1');    }    /**     * Set integer 0 as value of defined pin.     */    public function deactivate($relay) {        $this->snmpInstance->set($this->releys[$relay], 'i', '0');    }    /**     * Get pin status of all ports of the module.     *      * @return array     */    public function getAllPortsStatus() {        $allPins = array();        foreach ($this->allPorts as $number => $port) {            //get active pins as 8-bit integer of defined port            $getbits = $this->snmpInstance->get($port);            $bits = str_replace('INTEGER: ', '', $getbits);            //get pins status            $pinsStatus = $this->_getActivePins($bits);            $allPins[$number] = $pinsStatus;        }        return $allPins;    }    /**     * Make bitwise operation which will determine,     * which are active pins.     *      * @param int $bits     * @return array     */    private function _getActivePins($bits) {        $bitMapping = array(            1 => 1,            2 => 2,            3 => 4,            4 => 8,            5 => 16,            6 => 32,            7 => 64,            8 => 128        );        $pinsStatus = array();        foreach ($bitMapping as $int => $bit) {            if (($bits & $bit) == $bit) {                $pinsStatus[$int] = true;                continue;            }            $pinsStatus[$int] = false;        }        return $pinsStatus;    }}?>I have one module that receive SNMP request and send a command to relays. Also these are example scripts that use this lib:Turn on script:<?phprequire_once 'snmp_lib.php';$snmp = new snmp_lib('write');$snmp->activate($getRelayNumber);$snmp->closeSession();?>Turn off script:<?phprequire_once 'snmp_lib.php';$snmp = new snmp_lib('write');$snmp->deactivate($getRelayNumber);$snmp->closeSession();?>Script that get all ports status:<?phprequire_once 'snmp_lib.php';$snmp = new snmp_lib('read');$getActive = $snmp->getAllPortsStatus();?>