D7 running, D9 phpinfo ok

Docker/php-5.6-fpm/Dockerfile

@@ -0,0 +1,46 @@
+FROM php:5.6-fpm
+
+COPY ./php-custom.ini /usr/local/etc/php/conf.d/php-custom.ini
+
+RUN apt-get update && apt-get install -y \
+		libfreetype6-dev \
+		libjpeg62-turbo-dev \
+    libmcrypt-dev \
+		libpng-dev \
+		mysql-client \
+    zip && \
+		docker-php-ext-install -j$(nproc) iconv mcrypt && \
+		docker-php-ext-configure gd --with-freetype-dir=/usr/include/ --with-jpeg-dir=/usr/include/ && \
+		docker-php-ext-install -j$(nproc) gd && \
+		docker-php-ext-install pdo_mysql zip && \
+		docker-php-ext-install opcache && \
+		apt-get install -y git vim && \
+		pecl install redis-3.1.0 && \
+    pecl install xdebug-2.5.0 && \
+    docker-php-ext-enable redis xdebug && \
+		export COMPOSER_HOME=/usr/local/composer && \
+	    curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer && \
+	    composer global require drush/drush:6.5.0 && \
+	    composer global install && \
+	    ln -s /usr/local/composer/vendor/drush/drush/drush /usr/local/bin/drush
+
+ARG USER_UID
+ARG USER_UNAME
+ARG USER_GID
+ARG USER_GNAME
+
+RUN if getent group ${USER_GNAME} ; then groupdel ${USER_GNAME}; fi &&\
+		groupadd -g ${USER_GID} ${USER_GNAME} &&\
+    useradd -l -u ${USER_UID} -g ${USER_GNAME} ${USER_UNAME} &&\
+    install -d -m 0755 -o ${USER_UNAME} -g ${USER_GNAME} /home/${USER_UNAME} &&\
+    chown --changes --silent --no-dereference --recursive \
+          --from=33:33 ${USER_UID}:${USER_GID} \
+        /home/${USER_UNAME}
+        # /.composer \
+        # /var/run/php-fpm \
+        # /var/lib/php/sessions \
+
+COPY ./bashrc /home/${USER_UNAME}/.bashrc
+COPY ./inputrc /home/${USER_UNAME}/.inputrc
+
+USER ${USER_UNAME}