<?php
header("Content-Type: text/event-stream");
$lastEventId = $_SERVER['HTTP_LAST_EVENT_ID'];
if ($lastEventId)
echo "data: $lastEventId\n\n";
else {
echo "id: 77\n";
echo "retry: 300\n";
echo "data: hello\n\n";
echo "data: discarded";
}
?>