Build php containers 7.3.14, 5.6.4 and 5.1.6
$ docker-compose up -d
$ docker exec -it php-5.1.6 bash
$ docker exec -it php-5.6.4 bash
$ docker exec -it php-7.3.14 bash
# php-7.3.14
$ open http://localhost:4001
# php-5.6.4
$ open http://localhost:4002
# php-5.1.6
$ open http://localhost:4003