With the release of PHP 7 many heavily used extensions had to be ported to support the latest version. One extension I use heavily is the Gearman extension. This is a great extension for developing PHP applications that can process data in parallel and distribute their load over a network of servers.

But with the adoption of PHP 7, there is no ready made version that you can install—at least as far as I can tell. The maintainers have created a version that will work with PHP 7 which is fantastic, but it's a little tricky to install right now.

If you are using Docker and want to install the Gearman extension for PHP 7, check out the Dockerfile commands below:

# PHP Extension: Gearman
# Download Gearman PECL extension for Gearman supporting PHP 7
RUN apt-get -y --allow-unauthenticated install \  
    libgearman-dev
RUN cd /tmp \  
    && git clone https://github.com/wcgallego/pecl-gearman.git \
    && cd pecl-gearman \
    && git checkout gearman-2.0.3 \
    && phpize \
    && ./configure \
    && make \
    && make install
# Link to Apache PHP version
RUN echo "extension=/usr/lib/php/20160303/gearman.so" >> /etc/php/7.1/apache2/php.ini  
# Link to CLI version
RUN echo "extension=/usr/lib/php/20160303/gearman.so" >> /etc/php/7.1/cli/php.ini  

The last two commands are just enabling the extension with PHP. Depending on how you installed PHP in your image, you may need to tweak that part.