Teach you step by step to build the PHP version of RabbitMQ message queue development environment and Demo practice

[Original article from 51CTO.com] In the face of some business scenarios that are not responsive and time-consuming, in addition to using multi-threading or multi-process methods to handle them to improve the response speed of the program, as message queues become more and more mature, advanced message queues based on RabbitMQ are gradually entering the world of our programmers. It can also handle these scenarios. Today we will talk about the PHP version of RabbitMQ.

Local system environment

PHP: PHP 7.1.2

Web server: Apache

Database: MySQL

Operating system: Win7 64 bit

Install RabbitMQ server

Since RabbitMQ is based on Erlang, the first step is to install it. The current OS is Win7, so open the official website of Erlang, find the version corresponding to the operating system, download and install it. Since it is an exe file, we can directly click Next, Next, etc. to complete the installation of Erlang.

Next, install RabbitMQ. Open its official website and you can see that the software provides various operating system versions. We just need to select the corresponding version to download and install it. This is an exe file, so just click Next and then Next to complete it.

Install PHP RabbitMQ extension

First, open the PECL website, the official extension library of PHP, and find the AMQP (Advanced Message Queuing Protocol) extension. Why? Because the AMQP extension is a service program that can communicate with all AMQP-compatible programs, and RabbitMQ is an AMQP-compatible protocol.

When we open AMQP, we can see that it has a Windows extension (dll), but when we download it, we find that there are many versions, namely thread-safe and non-thread-safe, 64-bit and 32-bit versions. What should we do at this time?

I don't know if you have the experience of downloading PHP from the official PHP website and installing it. In fact, when you download PHP from the official website, there are thread safety and non-thread safety mentioned above. In other words, the corresponding PECL extension must correspond to your PHP version, otherwise, your extension will report an error and cannot be used. So we can use phpinfo to see the status of our current PHP version, and find the corresponding information to know which version of the extension to download.

I originally thought that I had completely installed this extension, but when I restarted the WEB server, I found a fatal problem, that is, the WEB server could not start normally, so I started various explorations, and finally found that the rabbitmq.4.dll file needs to be placed in the root directory of the PHP installation, that is, in the Windows environment, and this file needs to be copied to the same directory as php.ini. This file comes from the decompression of the above extension.

At this point, the PHP version of the RabbitMQ development environment has been completely built. The next exciting thing is to start my MQ development practice journey.

Some basic concepts

• Message producer: is the party that provides messages, and this party is mainly facing the business or users.
• Message consumer: It is the party that receives and processes messages. This party usually runs in a back-end polling mode, always ready to receive and process new messages.
• Channel: To use a vivid metaphor, with optical fiber, we can make landline calls, watch TV, surf the Internet, etc. One link can provide multiple modes of communication.
• Message Queue: RabbitMQ queues the messages produced by message producers to form a queue for consumers to process.
• Message queue creator: The message queue is created by the consumer because only the consumer knows how to process the message, not the message producer.
• Message routing and forwarding: A consumer may apply to create multiple message queues, so to which queue should the producer's message be delivered? This is mainly specified by the Exchange.

Conduct a PHP version Demo

Consumer side: server.php

Producer side: client.php

Start the RabbitMQ service and view the log

Looking at the log above, the relevant data has been saved in the file, successfully completing my first RabbitMQ journey.

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