sudo apt-get -y install gcc make autoconf libc-dev pkg-config
sudo apt-get -y install libssl-dev
sudo apt-get -y install librabbitmq-dev

sudo pecl install amqp

Set the path to librabbitmq install prefix [autodetect] :

sudo bash -c "echo extension=amqp.so > /etc/php/7.2/mods-avaliable/amqp.ini"

sudo ln -s /etc/php/7.2/mods-available/amqp.ini /etc/php/7.2/fpm/conf.d/20-amqp.ini
sudo ln -s /etc/php/7.2/mods-available/amqp.ini /etc/php/7.2/fpm/conf.d/20-amqp.ini

sudo service php7.2-fpm restart