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![PHP CHAT WITH SOCKETS](https://images.ctfassets.net/vzl5fkwyme3u/71dBtxsZPdBnAn8UgQTyRR/75ca0c2ab27af41ffc82b17d1be264d7/AdobeStock_265642631.jpeg?w=1000)
I am sharing a very interesting blog on how to create a chat system in php without using ajax. As we all know ajax based chat system in php is not a good solution
because it **increases the server load and redundant xhr calls** on our server.
Instead, I am going to use sockets for incoming messages from and send messages to another user. So lets try them out using the following steps:
### Step 1: Cross check in php.ini that sockets extension is enabled
/ /remove semicolon from very start of the extension like
### Step 2: Create `server.php` file
This file will handle the incoming and outgoing messages on sockets, Add following variables in to...
![PHP IPC with Daemon Service using Message Queues, Shared Memory and Semaphores](https://images.ctfassets.net/vzl5fkwyme3u/4ULcw2rCysGcSGOAi2uKOk/450013591b84069c5536663430536714/AdobeStock_200383770.jpeg?w=1000)
In a previous article we learned about [Creating a PHP Daemon Service](https://beta.nomadphp.com/blog/50/creating-a-php-daemon-service). Now we are going to learn how to use methods to perform IPC - Inter-Process Communication - to communicate with daemon processes.
# Message Queues
In the world of UNIX, there is an incredible variety of ways to send a message or a command to a daemon script and vice versa. But first I want to talk only about message queues - "System V IPC Messages Queues".
A long time ago I learned that a queue can be either in the System V IPC implementation, or in the POSIX implementation. I want to comment only about the System V implementation, as I know it better.
![Creating a PHP Daemon Service](https://images.ctfassets.net/vzl5fkwyme3u/18L41PfcrcYYkM0qAsCous/7caca26b8cfb5a643d8cb16b14ae5eae/AdobeStock_147870533.jpeg?w=1000)
# What is a Daemon?
The term daemon was coined by the programmers of Project MAC at MIT. It is inspired on Maxwell's demon in charge of sorting molecules in the background. The UNIX systems adopted this terminology for daemon programs.
It also refers to a character from Greek mythology that performs the tasks for which the gods do not want to take. As stated in the "Reference System Administrator UNIX", in ancient Greece, the concept of "personal daemon" was, in part, comparable to the modern concept of "guardian angel." BSD family of operating systems use the image as a demon's logo.
Daemons are usually started at machine boot time. In the technical sense, a demon is considered a process that does not have a controlling terminal, and accordingly there is no user interface. Mo...