Try Swoole with Docker

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Dockerfile

FROM php:7.2.19-cli-stretch

RUN apt-get update && apt-get install vim -y && \
    apt-get install openssl -y && \
    apt-get install libssl-dev -y && \
    apt-get install wget -y && \
    apt-get install git -y && \
    apt-get install procps -y && \
    apt-get install htop -y

RUN cd /tmp && git clone https://github.com/swoole/swoole-src.git && \
    cd swoole-src && \
    git checkout v4.4.0-alpha && \
    phpize  && \
    ./configure  --enable-openssl && \
    make && make install

RUN touch /usr/local/etc/php/conf.d/swoole.ini && \
    echo 'extension=swoole.so' > /usr/local/etc/php/conf.d/swoole.ini

RUN wget -O /usr/local/bin/dumb-init https://github.com/Yelp/dumb-init/releases/download/v1.2.2/dumb-init_1.2.2_amd64
RUN chmod +x /usr/local/bin/dumb-init

RUN apt-get autoremove -y && rm -rf /var/lib/apt/lists/*

ENTRYPOINT ["/usr/local/bin/dumb-init", "--", "php"]

Save the above content into ./Dockerfile

Build php-swoole Docker image

docker build -f ./Dockerfile -t swoole-php .

Example Swoole Applicaiton

<?php
$http = new swoole_http_server("0.0.0.0", 9501);

$http->on('start', function ($server) {
    echo "Swoole http server is started at http://127.0.0.1:9501\n";
});

$http->on('request', function ($request, $response) {
    $response->header("Content-Type", "text/plain");
    $response->end("Hello World\n");
});

$http->start();

Save the above code into ./server.php

Try your Swoole Application

docker run --rm -p 9501:9501 -v $(pwd):/app -w /app swoole-php server.php

You are able to access the hello world Swoole applicaiton from http://127.0.0.1:9501/