Dockerfile

FROM debian:jessie

# persistent / runtime deps
RUN apt-get update && apt-get install -y ca-certificates curl libpcre3 librecode0 libsqlite3-0 libxml2 --no-install-recommends && rm -r /var/lib/apt/lists/*

# phpize deps
RUN apt-get update && apt-get install -y autoconf file g++ gcc libc-dev make pkg-config re2c --no-install-recommends && rm -r /var/lib/apt/lists/*

ENV PHP_INI_DIR /usr/local/etc/php
RUN mkdir -p $PHP_INI_DIR/conf.d

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ENV GPG_KEYS 6E4F6AB321FDC07F2C332E3AC2BF0BC433CFC8B3 0BD78B5F97500D450838F95DFE857D9A90D90EC1
RUN set -xe \
	&& for key in $GPG_KEYS; do \
		gpg --keyserver ha.pool.sks-keyservers.net --recv-keys "$key"; \
	done

ENV PHP_VERSION 5.6.11

# --enable-mysqlnd is included below because it's harder to compile after the fact the extensions are (since it's a plugin for several extensions, not an extension in itself)
RUN buildDeps=" \
		$PHP_EXTRA_BUILD_DEPS \
		libcurl4-openssl-dev \
		libpcre3-dev \
		libreadline6-dev \
		librecode-dev \
		libsqlite3-dev \
		libssl-dev \
		libxml2-dev \
		xz-utils \
	" \
	&& set -x \
	&& apt-get update && apt-get install -y $buildDeps --no-install-recommends && rm -rf /var/lib/apt/lists/* \
	&& curl -SL "http://php.net/get/php-$PHP_VERSION.tar.xz/from/this/mirror" -o php.tar.xz \
	&& curl -SL "http://php.net/get/php-$PHP_VERSION.tar.xz.asc/from/this/mirror" -o php.tar.xz.asc \
	&& gpg --verify php.tar.xz.asc \
	&& mkdir -p /usr/src/php \
	&& tar -xof php.tar.xz -C /usr/src/php --strip-components=1 \
	&& rm php.tar.xz* \
	&& cd /usr/src/php \
	&& ./configure \
		--with-config-file-path="$PHP_INI_DIR" \
		--with-config-file-scan-dir="$PHP_INI_DIR/conf.d" \
		$PHP_EXTRA_CONFIGURE_ARGS \
		--disable-cgi \
		--enable-mysqlnd \
		--with-curl \
		--with-openssl \
		--with-pcre \
		--with-readline \
		--with-recode \
		--with-zlib \
	&& make -j"$(nproc)" \
	&& make install \
	&& { find /usr/local/bin /usr/local/sbin -type f -executable -exec strip --strip-all '{}' + || true; } \
	&& apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false -o APT::AutoRemove::SuggestsImportant=false $buildDeps \
	&& make clean

COPY docker-php-ext-* /usr/local/bin/

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CMD ["php", "-a"]
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