<?php

use \Zarplata\Zabbix\ZabbixSender;
use \Zarplata\Zabbix\Request\Packet as ZabbixPacket;
use \Zarplata\Zabbix\Request\Metric as ZabbixMetric;

// At first you must initialize ZabbixSender object
// with address of Zabbix Server. If your Zabbix Server
// don't listen default port (10051) you can define it in constructor
// $sender = new ZabbixSender(
//     $serverAddress='ZABBIX_SERVER_HOSTNAME',
//     $serverPort=12345
// );
$sender = new ZabbixSender('ZABBIX_SERVER_HOSTNAME');

// After you define the $sender you must create ZabbixPacket
// it's just accumulator of your metrics which you will add.
$packet = new ZabbixPacket();

// Define your metrinc
$packet->addMetric(new ZabbixMetric('my.super.text.item.key', 'OK'));
$packet->addMetric(new ZabbixMetric('my.super.int.item.key', 1));

// And finally send to Zabbix Server
$sender->send($packet);

<?php

new ZabbixMetric('my.super.text.item.key', 'OK');

<?php

(new ZabbixMetric('my.super.text.item.key', 'OK'))
    ->withHostname('my_non_local_hostname')
    ->withTimestamp(662637600); //Timestamp in past