I'm about to implement a system based on PHP that uses RabbitMQ. I can tell that there are 2 mature libraries out there: PECL AMQP and php-amqp.
I will be using PHP for both the client as well as the worker.
Does anybody have any practical experience with these 2 libraries? Is one better than the other for certain things? Are there any limitations when using any of these? Which one is more popular?
Original answer (before question edit):
PECL AMQP is documentation (pretty outdated, btw) for php-amqp.
P.S.: there are amqp client library implementation in pure php - php-amqplib which differs from PHP C extension php-amqp in some parts, but which is best for you - is up to you and your needs.