We had another scenario, where the mentioned combination was needed to be installed. It was a bit cumbersome, but the final solution turned out to be:

### METHOD 1: using Docker ###

1. Download official php-docker image.
2. You will need to modify file 8.0/buster/zts/apache/dockerfile :
   – where it says ENV PHP_EXTRA_CONFIGURE_ARGS add there another argument named --enable-zts (for other components, see the bottom note on this page)
   – before the line which starts by ENTRYPOINT ... add these block:

# ESSENTIALS #
RUN apt-get update; \
  apt-get install -y wget; \
  apt-get install -y libcurl3-dev; \
  apt-get install -y libssl-dev; \ #needed for swoole and many other things
  apt-get install -y sudo; \
  apt-get install -y git; \
  apt-get install -y systemd; \
  apt-get install -y unzip; \
  apt-get install -y nano; \
  docker-php-ext-install sockets

# PARALLEL #
# install from source, because  "RUN pecl install parallel;" does not work at this moment ( https://github.com/krakjoe/parallel/issues/106 ) 
RUN git clone https://github.com/krakjoe/parallel.git && cd parallel && phpize && ./configure --enable-parallel && make clean && make && make test && make install && docker-php-ext-enable parallel.so;

# Swoole #
# You can install with PECL or manually
# PECL
RUN pecl install swoole && docker-php-ext-enable swoole.so;
# MANUALLY
RUN git clone https://github.com/swoole/swoole-src.git && cd swoole-src && phpize clean && phpize && ./configure --enable-openssl --enable-sockets --enable-http2 --enable-mysqlnd --enable-swoole-curl --enable-swoole-json && make clean && make && make test && make install && docker-php-ext-enable swoole.so;


# Redis-Cache (if needed), read: https://puvox.software/blog/install-redis-cache-for-php-8/

Then, after successful build, we recommend looking these useful commands.

WordPress

If you want to install wordpress too onto this build, then:

1. Download https://github.com/docker-library/wordpress
2. Edit latest/php8.0/apache/dockerfile : In the top, where it says FROM php:8.0-apache write php:8.0 write your own built image name.
3. Build and that’s all.

### METHOD 2 : using PhpBrew ###

After following “requirements” part of phpbrew, then install PHP with phpbrew. at first check if echo $PKG_CONFIG_PATH variable returns result, if not, set it:

export PKG_CONFIG_PATH=/usr/lib/pkgconfig1

Then use

sudo apt-get install apache2-dev
sudo apt-get install libonig-dev
phpbrew --debug install 8.0 +default +mysql +sqlite +mb +debug +fpm +zip +intl +openssl=/usr/local/opt/openssl +bz2=/usr/local/opt/bzip2 +zlib=/usr/local/opt/zlib +apxs2=/usr/bin/apxs2  +zts -- --enable-zts
#for php7 (instead of +zts) in the end needs -- --enable-maintainer-zts, for older php8/phpbrew too, but word "-maintainer" is not needed
phpbrew --debug ext install swoole
phpbrew --debug ext install parallel #or follow instructions from github readme. If the command doesn't success, use:  phpbrew ext install parallel -- --enable-parallel-coverage --enable-parallel-dev
#p.s. you might need also these extensions in addition to above ones (for wordpress): +xmlrpc +gd +soap

and this will help to tell apache to use phpbrew.

____________

* Other components: some people might want to compile php with different components, like --with-gmp or etc. However, in such case, the needed module bases should be installed before php-module, so, in dockerfile you might need to put RUN apt-get update && apt-get install -y libgmp-dev before the php-build line.