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PHP SQS Tutorial Demo

For the article please visit: http://george.webb.uno/posts/aws-simple-queue-service-php-sdk

There is a live demo version of this running at: http://sqs-demo.george.webb.uno/

To install this demo for your self you will need a PHP web server running PHP 5.3 or later, composer, as well as PHP CLI with access to the imagick extension.

Instructions:

  • Clone this git repo
  • Run composer install
  • Setup config.php with AWS credentials and SQS queue name
  • Run the worker with command: "php -d extension=imagick.so worker.php"
  • Visit index.php and upload some images.

Quick explanation

For more detail please see my tutorial article linked above, or the tutorial.md file in this repository.

Essentially this is a demo showing a possible usage of SQS within a PHP application and an example implementation of the PHP AWS SDK. The demo involves a web page where a user can upload up to 10 images, which are put into a SQS queue to be watermarked. A separate component of the application is running in the background and watermarks each of these images from the queue. In reality the queue worker component would be running on a/many different servers and the image files would be stored remotely, rather than locally; however, for the sake of this demo, it is all done on the same machine.

Here is a quick breakdown of the important parts of this application:

  • src/Queue.php is the class containing all the logic for communicating with SQS
  • src/Message.php is the class containing the logic involved with the messages themselves and the processing of them
  • index.php is the webpage which images are uploaded to and the results displayed
  • images.php is the API call used by the demo JS for displaying queued and watermarked images
  • worker.php is the queue worker which is run through the PHP CLI and processes the watermarking messages

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An example of using SQS with the AWS PHP SDK, from my tutorial article.

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