$this->conn = new AMQPConnection($conn_args);

$this->conn->connect();

PHP Fatal error: Class 'AMQPConnection' not found

  # Download the rabbitmq-c library @ version 0-9-1

  git clone git://github.com/alanxz/rabbitmq-c.git

  cd rabbitmq-c

  # Enable and update the codegen git submodule

  git submodule init

  git submodule update

  # Configure, compile and install

  autoreconf -i 
  ./configure --prefix=/var/share/software/rabbitmq-c
  make && sudo make install

wget http://pecl.php.net/get/amqp-1.2.0.tgz

tar zxvf amqp-1.2.0.tgz

cd amqp-1.2.0

phpize

./configure --with-php-config=/path/to/your/php-config --with-librabbitmq-dir=/var/share/software/rabbitmq-c

sudo make

sudo make install