Dockerfile

FROM php:7.4-apache

# Install dependencies
RUN set -ex; \
    \
    savedAptMark="$(apt-mark showmanual)"; \
    \
    apt-get update; \
    apt-get install -y --no-install-recommends \
        libbz2-dev \
        libfreetype6-dev \
        libjpeg-dev \
        libpng-dev \
        libwebp-dev \
        libxpm-dev \
        libzip-dev \
    ; \
    \
    docker-php-ext-configure gd --with-freetype --with-jpeg --with-webp --with-xpm; \
    docker-php-ext-install -j "$(nproc)" \
        bz2 \
        gd \
        mysqli \
        opcache \
        zip \
    ; \
    \
    apt-mark auto '.*' > /dev/null; \
    apt-mark manual $savedAptMark; \
    ldd "$(php -r 'echo ini_get("extension_dir");')"/*.so \
        | awk '/=>/ { print $3 }' \
        | sort -u \
        | xargs -r dpkg-query -S \
        | cut -d: -f1 \
        | sort -u \
        | xargs -rt apt-mark manual; \
    \
    apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false; \
    rm -rf /var/lib/apt/lists/*

# set recommended PHP.ini settings
# see https://secure.php.net/manual/en/opcache.installation.php
RUN { \
        echo 'opcache.memory_consumption=128'; \
        echo 'opcache.interned_strings_buffer=8'; \
        echo 'opcache.max_accelerated_files=4000'; \
        echo 'opcache.revalidate_freq=2'; \
        echo 'opcache.fast_shutdown=1'; \
    } > $PHP_INI_DIR/conf.d/opcache-recommended.ini; \
    \
    { \
        echo 'session.cookie_httponly = 1'; \
        echo 'session.use_strict_mode = 1'; \
    } > $PHP_INI_DIR/conf.d/session-strict.ini; \
    \
    { \
        echo 'allow_url_fopen = Off'; \
        echo 'max_execution_time = 600'; \
        echo 'memory_limit = 512M'; \
    } > $PHP_INI_DIR/conf.d/phpmyadmin-misc.ini

# Calculate download URL
ENV VERSION 4.9.2
ENV URL https://files.phpmyadmin.net/phpMyAdmin/${VERSION}/phpMyAdmin-${VERSION}-all-languages.tar.xz
LABEL version=$VERSION

# Download tarball, verify it using gpg and extract
RUN set -ex; \
    fetchDeps=" \
        gnupg \
        dirmngr \
    "; \
    apt-get update; \
    apt-get install -y --no-install-recommends $fetchDeps; \
    \
    export GNUPGHOME="$(mktemp -d)"; \
    export GPGKEY="3D06A59ECE730EB71B511C17CE752F178259BD92"; \
    curl --output phpMyAdmin.tar.xz --location $URL; \
    curl --output phpMyAdmin.tar.xz.asc --location $URL.asc; \
    gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys "$GPGKEY" \
        || gpg --batch --keyserver ipv4.pool.sks-keyservers.net --recv-keys "$GPGKEY" \
        || gpg --batch --keyserver keys.gnupg.net --recv-keys "$GPGKEY" \
        || gpg --batch --keyserver pgp.mit.edu --recv-keys "$GPGKEY" \
        || gpg --batch --keyserver keyserver.pgp.com --recv-keys "$GPGKEY"; \
    gpg --batch --verify phpMyAdmin.tar.xz.asc phpMyAdmin.tar.xz; \
    tar -xf phpMyAdmin.tar.xz -C /usr/src; \
    gpgconf --kill all; \
    rm -r "$GNUPGHOME" phpMyAdmin.tar.xz phpMyAdmin.tar.xz.asc; \
    mv /usr/src/phpMyAdmin-$VERSION-all-languages /usr/src/phpmyadmin; \
    rm -rf /usr/src/phpmyadmin/setup/ /usr/src/phpmyadmin/examples/ /usr/src/phpmyadmin/test/ /usr/src/phpmyadmin/po/ /usr/src/phpmyadmin/composer.json /usr/src/phpmyadmin/RELEASE-DATE-$VERSION; \
    sed -i "s@define('CONFIG_DIR'.*@define('CONFIG_DIR', '/etc/phpmyadmin/');@" /usr/src/phpmyadmin/libraries/vendor_config.php; \
# Add directory for sessions to allow session persistence
    mkdir /sessions; \
    mkdir -p /var/nginx/client_body_temp; \
    \
    apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false $fetchDeps; \
    rm -rf /var/lib/apt/lists/*

# Copy configuration
COPY config.inc.php /etc/phpmyadmin/config.inc.php

# Copy main script
COPY docker-entrypoint.sh /docker-entrypoint.sh

ENTRYPOINT [ "/docker-entrypoint.sh" ]
CMD ["apache2-foreground"]