php/Dockerfile-alpine.template

{{ include "version-id" -}}
FROM {{ env.from }}

# dependencies required for running "phpize"
# these get automatically installed and removed by "docker-php-ext-*" (unless they're already installed)
ENV PHPIZE_DEPS \
		autoconf \
		dpkg-dev dpkg \
		file \
		g++ \
		gcc \
		libc-dev \
		make \
		pkgconf \
		re2c

# persistent / runtime deps
RUN apk add --no-cache \
		ca-certificates \
		curl \
		tar \
		xz \
# https://github.com/docker-library/php/issues/494
		openssl

# ensure www-data user exists
RUN set -eux; \
	addgroup -g 82 -S www-data; \
	adduser -u 82 -D -S -G www-data www-data
# 82 is the standard uid/gid for "www-data" in Alpine
# https://git.alpinelinux.org/aports/tree/main/apache2/apache2.pre-install?h=3.9-stable
# https://git.alpinelinux.org/aports/tree/main/lighttpd/lighttpd.pre-install?h=3.9-stable
# https://git.alpinelinux.org/aports/tree/main/nginx/nginx.pre-install?h=3.9-stable

ENV PHP_INI_DIR /usr/local/etc/php
RUN set -eux; \
	mkdir -p "$PHP_INI_DIR/conf.d"; \
# allow running as an arbitrary user (https://github.com/docker-library/php/issues/743)
	[ ! -d /var/www/html ]; \
	mkdir -p /var/www/html; \
	chown www-data:www-data /var/www/html; \
	chmod 777 /var/www/html
{{
	if env.variantBlock1 != "" then
		"\n" + env.variantBlock1 + "\n"
	else "" end
}}
# Apply stack smash protection to functions using local buffers and alloca()
# Make PHP's main executable position-independent (improves ASLR security mechanism, and has no performance impact on x86_64)
# Enable optimization (-O2)
# Enable linker optimization (this sorts the hash buckets to improve cache locality, and is non-default)
# https://github.com/docker-library/php/issues/272
# -D_LARGEFILE_SOURCE and -D_FILE_OFFSET_BITS=64 (https://www.php.net/manual/en/intro.filesystem.php)
ENV PHP_CFLAGS="-fstack-protector-strong -fpic -fpie -O2 -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
ENV PHP_CPPFLAGS="$PHP_CFLAGS"
ENV PHP_LDFLAGS="-Wl,-O1 -pie"

ENV GPG_KEYS {{ .gpgKeys }}

ENV PHP_VERSION {{ .version }}
ENV PHP_URL="{{ .url }}" PHP_ASC_URL="{{ .ascUrl // "" }}"
ENV PHP_SHA256="{{ .sha256 // "" }}"

RUN set -eux; \
	\
	apk add --no-cache --virtual .fetch-deps gnupg; \
	\
	mkdir -p /usr/src; \
	cd /usr/src; \
	\
	curl -fsSL -o php.tar.xz "$PHP_URL"; \
	\
	if [ -n "$PHP_SHA256" ]; then \
		echo "$PHP_SHA256 *php.tar.xz" | sha256sum -c -; \
	fi; \
	\
	if [ -n "$PHP_ASC_URL" ]; then \
		curl -fsSL -o php.tar.xz.asc "$PHP_ASC_URL"; \
		export GNUPGHOME="$(mktemp -d)"; \
		for key in $GPG_KEYS; do \
			gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys "$key"; \
		done; \
		gpg --batch --verify php.tar.xz.asc php.tar.xz; \
		gpgconf --kill all; \
		rm -rf "$GNUPGHOME"; \
	fi; \
	\
	apk del --no-network .fetch-deps

COPY docker-php-source /usr/local/bin/

RUN set -eux; \
	apk add --no-cache --virtual .build-deps \
		$PHPIZE_DEPS \
		argon2-dev \
		coreutils \
		curl-dev \
		libedit-dev \
{{ if (.version | version_id) >= ("7.2" | version_id) then ( -}}
		libsodium-dev \
{{ ) else "" end -}}
		libxml2-dev \
{{
	# https://github.com/docker-library/php/issues/888
	if (.version | version_id) >= ("7.4" | version_id) then (
-}}
		linux-headers \
{{ ) else "" end -}}
{{ if (.version | version_id) >= ("7.4" | version_id) then ( -}}
		oniguruma-dev \
{{ ) else "" end -}}
		openssl-dev \
		sqlite-dev \
	; \
	\
	export CFLAGS="$PHP_CFLAGS" \
		CPPFLAGS="$PHP_CPPFLAGS" \
		LDFLAGS="$PHP_LDFLAGS" \
	; \
	docker-php-source extract; \
	cd /usr/src/php; \
	gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)"; \
	./configure \
		--build="$gnuArch" \
		--with-config-file-path="$PHP_INI_DIR" \
		--with-config-file-scan-dir="$PHP_INI_DIR/conf.d" \
		\
# make sure invalid --configure-flags are fatal errors instead of just warnings
		--enable-option-checking=fatal \
		\
# https://github.com/docker-library/php/issues/439
		--with-mhash \
		\
# https://github.com/docker-library/php/issues/822
		--with-pic \
		\
# --enable-ftp is included here because ftp_ssl_connect() needs ftp to be compiled statically (see https://github.com/docker-library/php/issues/236)
		--enable-ftp \
# --enable-mbstring is included here because otherwise there's no way to get pecl to use it properly (see https://github.com/docker-library/php/issues/195)
		--enable-mbstring \
# --enable-mysqlnd is included here because it's harder to compile after the fact than extensions are (since it's a plugin for several extensions, not an extension in itself)
		--enable-mysqlnd \
# https://wiki.php.net/rfc/argon2_password_hash (7.2+)
		--with-password-argon2 \
{{ if (.version | version_id) >= ("7.2" | version_id) then ( -}}
# https://wiki.php.net/rfc/libsodium
		--with-sodium=shared \
{{ ) else "" end -}}
# always build against system sqlite3 (https://github.com/php/php-src/commit/6083a387a81dbbd66d6316a3a12a63f06d5f7109)
		--with-pdo-sqlite=/usr \
		--with-sqlite3=/usr \
		\
		--with-curl \
		--with-libedit \
		--with-openssl \
		--with-zlib \
		\
{{ if (.version | version_id) | . >= ("7.4" | version_id) and . < ("8" | version_id) then ( -}}
# in PHP 7.4+, the pecl/pear installers are officially deprecated (requiring an explicit "--with-pear")
# ... and are removed in PHP 8+; see also https://github.com/docker-library/php/pull/847#issuecomment-505638229
		--with-pear \
		\
{{ ) else "" end -}}
# bundled pcre does not support JIT on s390x
# https://manpages.debian.org/stretch/libpcre3-dev/pcrejit.3.en.html#AVAILABILITY_OF_JIT_SUPPORT
		$(test "$gnuArch" = 's390x-linux-musl' && echo '--without-pcre-jit') \
		\
		${PHP_EXTRA_CONFIGURE_ARGS:-} \
	; \
	make -j "$(nproc)"; \
	find -type f -name '*.a' -delete; \
	make install; \
	find /usr/local/bin /usr/local/sbin -type f -perm +0111 -exec strip --strip-all '{}' + || true; \
	make clean; \
	\
# https://github.com/docker-library/php/issues/692 (copy default example "php.ini" files somewhere easily discoverable)
	cp -v php.ini-* "$PHP_INI_DIR/"; \
	\
	cd /; \
	docker-php-source delete; \
	\
	runDeps="$( \
		scanelf --needed --nobanner --format '%n#p' --recursive /usr/local \
			| tr ',' '\n' \
			| sort -u \
			| awk 'system("[ -e /usr/local/lib/" $1 " ]") == 0 { next } { print "so:" $1 }' \
	)"; \
	apk add --no-cache $runDeps; \
	\
	apk del --no-network .build-deps; \
	\
{{ if (.version | version_id) < ("8" | version_id) then ( -}}
# update pecl channel definitions https://github.com/docker-library/php/issues/443
	pecl update-channels; \
	rm -rf /tmp/pear ~/.pearrc; \
	\
{{ ) else "" end -}}
# smoke test
	php --version

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

{{ if (.version | version_id) >= ("7.2" | version_id) then ( -}}
# sodium was built as a shared module (so that it can be replaced later if so desired), so let's enable it too (https://github.com/docker-library/php/issues/598)
RUN docker-php-ext-enable sodium

{{ ) else "" end -}}
ENTRYPOINT ["docker-php-entrypoint"]
{{
	if env.variantBlock2 != "" then
		env.variantBlock2 + "\n"
	else "" end
	+ "CMD " + env.cmd
}}