Docker image build with PHP zip extension shows "bundled libzip is deprecated" warning

Question

I have a Dockerfile with a build command like this:

#install some base extensions RUN apt-get install -y \         zlib1g-dev \         zip \   && docker-php-ext-install zip 

I get this warning from build output:

WARNING: Use of bundled libzip is deprecated and will be removed.
configure: WARNING: Some features such as encryption and bzip2 are not available.
configure: WARNING: Use system library and --with-libzip is recommended.

What is the correct way to install the zip extension without these warnings?

My complete Dockerfile looks like:

FROM php:7.2-apache  RUN apt-get clean RUN apt-get update  #install some basic tools RUN apt-get install -y \         git \         tree \         vim \         wget \         subversion  #install some base extensions RUN apt-get install -y \         zlib1g-dev \         zip \   && docker-php-ext-install zip  #setup composer RUN curl -sS https://getcomposer.org/installer | php \         && mv composer.phar /usr/local/bin/ \         && ln -s /usr/local/bin/composer.phar /usr/local/bin/composer   WORKDIR /var/www/ 

Answer 1

It looks like PHP no longer bundles libzip. You need to install it. You install zlib1g-dev, but instead install libzip-dev. This installs zlib1g-dev as a dependency and allows the configure script to detect that libzip is installed.

For PHP < 7.3, you then need to

docker-php-ext-configure zip --with-libzip 

before performing the installation with

docker-php-ext-install zip 

as the last warning indicates.

In short: change the relevant part of your Dockerfile to

For PHP < 7.3

#install some base extensions RUN apt-get install -y \         libzip-dev \         zip \   && docker-php-ext-configure zip --with-libzip \   && docker-php-ext-install zip 

For PHP >= 7.3

#install some base extensions RUN apt-get install -y \         libzip-dev \         zip \   && docker-php-ext-install zip 

I have verified that this builds as expected.

 

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In case you are not using the Docker PHP base image, things may be much easier. For example, for Alpine the following Dockerfile will get you PHP 7 with the zip extension installed.

FROM alpine:latest  RUN apk update && apk upgrade RUN apk add php7 php7-zip composer