In what scenarios would ZeroMQ be a suitable solution for maintaining communication between a PHP webpage and a Python server?

ZeroMQ would be a suitable solution for maintaining communication between a PHP webpage and a Python server when you need a fast and efficient messaging system that can handle high volumes of data transfer. It allows for asynchronous communication, which can improve performance by reducing latency. Additionally, ZeroMQ supports various messaging patterns like publish-subscribe and request-reply, providing flexibility in designing the communication flow between the PHP frontend and Python backend.

<?php

$context = new ZMQContext();
$socket = $context->getSocket(ZMQ::SOCKET_REQ);
$socket->connect("tcp://127.0.0.1:5555");

$request = "Hello from PHP!";
$socket->send($request);

$response = $socket->recv();
echo "Received response from Python server: " . $response;

$socket->disconnect("tcp://127.0.0.1:5555");