Sending data to Python Script from PHP

php, python, sockets

Solution

You can use redis (pub/sub feature for example) as interprocess communication facility.

Redis is an open source (BSD licensed), in-memory data structure store, used as a database, cache and message broker. It supports data structures such as strings, hashes, lists, sets, sorted sets with range queries, bitmaps, hyperloglogs and geospatial indexes with radius queries. Redis has built-in replication, Lua scripting, LRU eviction, transactions and different levels of on-disk persistence, and provides high availability via Redis Sentinel and automatic partitioning with Redis Cluster.

Besides of IPC via redis you can use it as distributed key-value database - big advantage of redis imho.

Another choice - zeromq - one of most known tools for interprocess communication. There is many tutorials and docs about it on internet. Original guide: http://zguide.zeromq.org/page:all

ØMQ (also known as ZeroMQ, 0MQ, or zmq) looks like an embeddable networking library but acts like a concurrency framework. It gives you sockets that carry atomic messages across various transports like in-process, inter-process, TCP, and multicast. You can connect sockets N-to-N with patterns like fan-out, pub-sub, task distribution, and request-reply. It's fast enough to be the fabric for clustered products. Its asynchronous I/O model gives you scalable multicore applications, built as asynchronous message-processing tasks. It has a score of language APIs and runs on most operating systems. ØMQ is from iMatix and is LGPLv3 open source.

Hello world server and client on python: https://learning-0mq-with-pyzmq.readthedocs.org/en/latest/pyzmq/patterns/client_server.html

Simple example of PHP server and python client from official guide:

PHP server:

<?php
/*
*  Hello World server
*  Binds REP socket to tcp://*:5555
*  Expects "Hello" from client, replies with "World"
* @author Ian Barber <ian(dot)barber(at)gmail(dot)com>
*/

$context = new ZMQContext(1);

//  Socket to talk to clients
$responder = new ZMQSocket($context, ZMQ::SOCKET_REP);
$responder->bind("tcp://*:5555");

while (true) {
    //  Wait for next request from client
    $request = $responder->recv();
    printf ("Received request: [%s]\n", $request);

    //  Do some 'work'
    sleep (1);

    //  Send reply back to client
    $responder->send("World");
}

Hello World client in Python:

#
#   Hello World client in Python
#   Connects REQ socket to tcp://localhost:5555
#   Sends "Hello" to server, expects "World" back
#
import zmq

context = zmq.Context()

#  Socket to talk to server
print "Connecting to hello world server…"
socket = context.socket(zmq.REQ)
socket.connect("tcp://localhost:5555")

#  Do 10 requests, waiting each time for a response
for request in range(10):
    print "Sending request %s …" % request
    socket.send("Hello")

    #  Get the reply.
    message = socket.recv()
    print "Received reply %s [ %s ]" % (request, message)

Problem

Original source