h1. Parallel processing in PHP with RabbitMQ h2. Introduction This is a very simple example on how to accomplish parallel processing with PHP by using the messaging application RabbitMQ. See http://geekexmachina.com/2010/10/parallelizing-php-rabbitmq/ for more details. h2. Requirements - PHP 5.3 - RabbitMQ running on localhost (update the include.php file for connection setting) - The library PHP-AMQPLIB from http://github.com/tnc/php-amqplib (update include.php for path to the library) h2. Installation In any folder, run this: $ git clone http://github.com/elboby/ParallelExample $ cd ParallelExample $ git http://github.com/tnc/php-amqplib h2. Run In the ParallelExample folder: - Launch first the 2 consumers in 2 separate terminals: $ php consume.php a $ php consume.php b - In another terminal, launch the main script: $ php run_parallel.php h2. Output If it works, you should see this in the consumer terminals: $ php consume.php a 23:38:04: a : PHPPROCESS_24025 : start processing... 23:38:14: a : PHPPROCESS_24025 : done in 10 seconds! ^C $ php consume.php b 23:38:04: b : PHPPROCESS_24025 : start processing... 23:38:09: b : PHPPROCESS_24025 : done in 5 seconds! ^C And in the main terminal $ php run_parallel.php 23:38:04 : PHPPROCESS_24025 : waiting for responses... array(2){["b"]=> string(15) "waited 5seconds" ["a"]=> string(16) "waited 10seconds" } 23:38:14 : PHPPROCESS_24025 : done in 10.010743141174 seconds $