diff --git a/.travis.yml b/.travis.yml
index c67b3aaa..2e37a839 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,17 +3,26 @@ services: docker
 
 env:
   - VERSION=7.0 VARIANT=
+  - VERSION=7.0 VARIANT=alpine
   - VERSION=7.0 VARIANT=apache
   - VERSION=7.0 VARIANT=fpm
+  - VERSION=7.0 VARIANT=fpm/alpine
   - VERSION=7.0 VARIANT=zts
+  - VERSION=7.0 VARIANT=zts/alpine
   - VERSION=5.6 VARIANT=
+  - VERSION=5.6 VARIANT=alpine
   - VERSION=5.6 VARIANT=apache
   - VERSION=5.6 VARIANT=fpm
+  - VERSION=5.6 VARIANT=fpm/alpine
   - VERSION=5.6 VARIANT=zts
+  - VERSION=5.6 VARIANT=zts/alpine
   - VERSION=5.5 VARIANT=
+  - VERSION=5.5 VARIANT=alpine
   - VERSION=5.5 VARIANT=apache
   - VERSION=5.5 VARIANT=fpm
+  - VERSION=5.5 VARIANT=fpm/alpine
   - VERSION=5.5 VARIANT=zts
+  - VERSION=5.5 VARIANT=zts/alpine
 
 install:
   - git clone https://github.com/docker-library/official-images.git ~/official-images
@@ -22,6 +31,7 @@ before_script:
   - env | sort
   - cd "$VERSION"
   - image="php:${VERSION}${VARIANT:+-$VARIANT}"
+  - image="${image//'/'/-}"
 
 script:
   - docker build -t "$image" "${VARIANT:-.}"
diff --git a/Dockerfile-alpine.template b/Dockerfile-alpine.template
new file mode 100644
index 00000000..391f0fb9
--- /dev/null
+++ b/Dockerfile-alpine.template
@@ -0,0 +1,91 @@
+FROM alpine:3.3
+
+# phpize deps
+RUN apk add --no-cache --virtual .phpize-deps \
+		autoconf \
+		file \
+		g++ \
+		gcc \
+		libc-dev \
+		make \
+		pkgconf \
+		re2c
+
+# persistent / runtime deps
+RUN apk add --no-cache --virtual .persistent-deps \
+		ca-certificates \
+		curl
+
+# ensure www-data user exists
+RUN set -x \
+	&& 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
+# http://git.alpinelinux.org/cgit/aports/tree/main/apache2/apache2.pre-install?h=v3.3.2
+# http://git.alpinelinux.org/cgit/aports/tree/main/lighttpd/lighttpd.pre-install?h=v3.3.2
+# http://git.alpinelinux.org/cgit/aports/tree/main/nginx-initscripts/nginx-initscripts.pre-install?h=v3.3.2
+
+ENV PHP_INI_DIR /usr/local/etc/php
+RUN mkdir -p $PHP_INI_DIR/conf.d
+
+##<autogenerated>##
+##</autogenerated>##
+
+ENV GPG_KEYS %%GPG_KEYS%%
+
+ENV PHP_VERSION %%PHP_VERSION%%
+ENV PHP_FILENAME %%PHP_FILENAME%%
+ENV PHP_SHA256 %%PHP_SHA256%%
+
+RUN set -xe \
+	&& apk add --no-cache --virtual .build-deps \
+		curl-dev \
+		gnupg \
+		libedit-dev \
+		libxml2-dev \
+		openssl-dev \
+		sqlite-dev \
+	&& curl -fSL "http://php.net/get/$PHP_FILENAME/from/this/mirror" -o "$PHP_FILENAME" \
+	&& echo "$PHP_SHA256 *$PHP_FILENAME" | sha256sum -c - \
+	&& curl -fSL "http://php.net/get/$PHP_FILENAME.asc/from/this/mirror" -o "$PHP_FILENAME.asc" \
+	&& export GNUPGHOME="$(mktemp -d)" \
+	&& for key in $GPG_KEYS; do \
+		gpg --keyserver ha.pool.sks-keyservers.net --recv-keys "$key"; \
+	done \
+	&& gpg --batch --verify "$PHP_FILENAME.asc" "$PHP_FILENAME" \
+	&& rm -r "$GNUPGHOME" "$PHP_FILENAME.asc" \
+	&& mkdir -p /usr/src \
+	&& tar -Jxf "$PHP_FILENAME" -C /usr/src \
+	&& mv "/usr/src/php-$PHP_VERSION" /usr/src/php \
+	&& rm "$PHP_FILENAME" \
+	&& cd /usr/src/php \
+	&& ./configure \
+		--with-config-file-path="$PHP_INI_DIR" \
+		--with-config-file-scan-dir="$PHP_INI_DIR/conf.d" \
+		$PHP_EXTRA_CONFIGURE_ARGS \
+		--disable-cgi \
+# --enable-mysqlnd is included here because it's harder to compile after the fact than extensions are (since it's a plugin for several extensions, not an extension in itself)
+		--enable-mysqlnd \
+		--with-curl \
+		--with-libedit \
+		--with-openssl \
+		--with-zlib \
+	&& make -j"$(getconf _NPROCESSORS_ONLN)" \
+	&& make install \
+	&& { find /usr/local/bin /usr/local/sbin -type f -perm +0111 -exec strip --strip-all '{}' + || true; } \
+	&& make clean \
+	&& runDeps="$( \
+		scanelf --needed --nobanner --recursive /usr/local \
+			| awk '{ gsub(/,/, "\nso:", $2); print "so:" $2 }' \
+			| sort -u \
+			| xargs -r apk info --installed \
+			| sort -u \
+	)" \
+	&& apk add --virtual .php-rundeps $runDeps \
+	&& apk del .build-deps
+
+COPY docker-php-ext-* /usr/local/bin/
+
+##<autogenerated>##
+CMD ["php", "-a"]
+##</autogenerated>##
diff --git a/Dockerfile-debian.template b/Dockerfile-debian.template
new file mode 100644
index 00000000..4d453d98
--- /dev/null
+++ b/Dockerfile-debian.template
@@ -0,0 +1,81 @@
+FROM debian:jessie
+
+# 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/*
+
+# persistent / runtime deps
+RUN apt-get update && apt-get install -y \
+		ca-certificates \
+		curl \
+		libedit2 \
+		libsqlite3-0 \
+		libxml2 \
+	--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
+
+##<autogenerated>##
+##</autogenerated>##
+
+ENV GPG_KEYS %%GPG_KEYS%%
+
+ENV PHP_VERSION %%PHP_VERSION%%
+ENV PHP_FILENAME %%PHP_FILENAME%%
+ENV PHP_SHA256 %%PHP_SHA256%%
+
+RUN set -xe \
+	&& buildDeps=" \
+		$PHP_EXTRA_BUILD_DEPS \
+		libcurl4-openssl-dev \
+		libedit-dev \
+		libsqlite3-dev \
+		libssl-dev \
+		libxml2-dev \
+		xz-utils \
+	" \
+	&& apt-get update && apt-get install -y $buildDeps --no-install-recommends && rm -rf /var/lib/apt/lists/* \
+	&& curl -fSL "http://php.net/get/$PHP_FILENAME/from/this/mirror" -o "$PHP_FILENAME" \
+	&& echo "$PHP_SHA256 *$PHP_FILENAME" | sha256sum -c - \
+	&& curl -fSL "http://php.net/get/$PHP_FILENAME.asc/from/this/mirror" -o "$PHP_FILENAME.asc" \
+	&& export GNUPGHOME="$(mktemp -d)" \
+	&& for key in $GPG_KEYS; do \
+		gpg --keyserver ha.pool.sks-keyservers.net --recv-keys "$key"; \
+	done \
+	&& gpg --batch --verify "$PHP_FILENAME.asc" "$PHP_FILENAME" \
+	&& rm -r "$GNUPGHOME" "$PHP_FILENAME.asc" \
+	&& mkdir -p /usr/src/php \
+	&& tar -xf "$PHP_FILENAME" -C /usr/src/php --strip-components=1 \
+	&& rm "$PHP_FILENAME" \
+	&& cd /usr/src/php \
+	&& ./configure \
+		--with-config-file-path="$PHP_INI_DIR" \
+		--with-config-file-scan-dir="$PHP_INI_DIR/conf.d" \
+		$PHP_EXTRA_CONFIGURE_ARGS \
+		--disable-cgi \
+# --enable-mysqlnd is included here because it's harder to compile after the fact than extensions are (since it's a plugin for several extensions, not an extension in itself)
+		--enable-mysqlnd \
+		--with-curl \
+		--with-libedit \
+		--with-openssl \
+		--with-zlib \
+	&& make -j"$(nproc)" \
+	&& make install \
+	&& { find /usr/local/bin /usr/local/sbin -type f -executable -exec strip --strip-all '{}' + || true; } \
+	&& make clean \
+	&& apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false -o APT::AutoRemove::SuggestsImportant=false $buildDeps
+
+COPY docker-php-ext-* /usr/local/bin/
+
+##<autogenerated>##
+CMD ["php", "-a"]
+##</autogenerated>##
diff --git a/docker-php-ext-configure b/docker-php-ext-configure
index 3d21b5bb..39947c8f 100755
--- a/docker-php-ext-configure
+++ b/docker-php-ext-configure
@@ -1,9 +1,9 @@
-#!/bin/bash
+#!/bin/sh
 set -e
 
 ext="$1"
 extDir="/usr/src/php/ext/$ext"
-if [ -z "$ext" -o ! -d "$extDir" ]; then
+if [ -z "$ext" ] || ! [ -d "$extDir" ]; then
 	echo >&2 "usage: $0 ext-name [configure flags]"
 	echo >&2 "   ie: $0 gd --with-jpeg-dir=/usr/local/something"
 	echo >&2
diff --git a/docker-php-ext-enable b/docker-php-ext-enable
index edb07ed8..367aaf2b 100755
--- a/docker-php-ext-enable
+++ b/docker-php-ext-enable
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 set -e
 
 cd "$(php -r 'echo ini_get("extension_dir");')"
@@ -34,32 +34,30 @@ while true; do
 	esac
 done
 
-modules=()
-while [ $# -gt 0 ]; do
-	module="$1"
-	shift
+modules=
+for module; do
 	if [ -z "$module" ]; then
 		continue
 	fi
-	if [ -f "$module.so" -a ! -f "$module" ]; then
+	if [ -f "$module.so" ] && ! [ -f "$module" ]; then
 		# allow ".so" to be optional
-		module+='.so'
+		module="$module.so"
 	fi
-	if [ ! -f "$module" ]; then
+	if ! [ -f "$module" ]; then
 		echo >&2 "error: $(readlink -f "$module") does not exist"
 		echo >&2
 		usage >&2
 		exit 1
 	fi
-	modules+=( "$module" )
+	modules="$modules $module"
 done
 
-if [ "${#modules[@]}" -eq 0 ]; then
+if [ -z "$modules" ]; then
 	usage >&2
 	exit 1
 fi
 
-for module in "${modules[@]}"; do
+for module in $modules; do
 	if nm -g "$module" | grep -q ' zend_extension_entry$'; then
 		# https://wiki.php.net/internals/extensions#loading_zend_extensions
 		line="zend_extension=$(readlink -f "$module")"
diff --git a/docker-php-ext-install b/docker-php-ext-install
index 2c488cce..67180a86 100755
--- a/docker-php-ext-install
+++ b/docker-php-ext-install
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 set -e
 
 cd /usr/src/php/ext
@@ -36,10 +36,8 @@ while true; do
 	esac
 done
 
-exts=()
-while [ $# -gt 0 ]; do
-	ext="$1"
-	shift
+exts=
+for ext; do
 	if [ -z "$ext" ]; then
 		continue
 	fi
@@ -49,21 +47,25 @@ while [ $# -gt 0 ]; do
 		usage >&2
 		exit 1
 	fi
-	exts+=( "$ext" )
+	exts="$exts $ext"
 done
 
-if [ "${#exts[@]}" -eq 0 ]; then
+if [ -z "$exts" ]; then
 	usage >&2
 	exit 1
 fi
 
-for ext in "${exts[@]}"; do
+for ext in $exts; do
 	(
 		cd "$ext"
 		[ -e Makefile ] || docker-php-ext-configure "$ext"
 		make -j"$j"
 		make -j"$j" install
-		find modules -maxdepth 1 -name '*.so' -exec basename '{}' ';' | xargs --no-run-if-empty --verbose docker-php-ext-enable
+		find modules \
+			-maxdepth 1 \
+			-name '*.so' \
+			-exec basename '{}' ';' \
+				| xargs -r docker-php-ext-enable
 		make -j"$j" clean
 	)
 done
diff --git a/update.sh b/update.sh
index 087c2f06..cd600f6d 100755
--- a/update.sh
+++ b/update.sh
@@ -63,18 +63,37 @@ for version in "${versions[@]}"; do
 		exit 1
 	fi
 	
-	( set -x; cp docker-php-ext-* "$version/" )
+	dockerfiles=()
 	
-	for variant in apache fpm zts; do
-		echo "Generating $version/$variant/Dockerfile from $variant-Dockerfile-block-*"
+	cp -v Dockerfile-debian.template "$version/Dockerfile"
+	cp -v docker-php-ext-* "$version/"
+	dockerfiles+=( "$version/Dockerfile" )
+	
+	if [ -d "$version/alpine" ]; then
+		cp -v Dockerfile-alpine.template "$version/alpine/Dockerfile"
+		cp -v docker-php-ext-* "$version/alpine/"
+		dockerfiles+=( "$version/alpine/Dockerfile" )
+	fi
+	
+	for target in apache fpm zts fpm/alpine zts/alpine; do
+		[ -d "$version/$target" ] || continue
+		base="$version/Dockerfile"
+		variant="${target%%/*}"
+		if [ "$target" != "$variant" ]; then
+			variantVariant="${target#$variant/}"
+			[ -d "$version/$variantVariant" ] || continue
+			base="$version/$variantVariant/Dockerfile"
+		fi
+		echo "Generating $version/$target/Dockerfile from $base + $variant-Dockerfile-block-*"
 		awk '
 			$1 == "##</autogenerated>##" { ia = 0 }
 			!ia { print }
 			$1 == "##<autogenerated>##" { ia = 1; ab++; ac = 0 }
 			ia { ac++ }
 			ia && ac == 1 { system("cat '$variant'-Dockerfile-block-" ab) }
-		' "$version/Dockerfile" > "$version/$variant/Dockerfile"
-		( set -x; cp docker-php-ext-* "$version/$variant/" )
+		' "$base" > "$version/$target/Dockerfile"
+		cp -v docker-php-ext-* "$version/$target/"
+		dockerfiles+=( "$version/$target/Dockerfile" )
 	done
 	
 	if [ -z "$fullVersion" ]; then
@@ -85,10 +104,10 @@ for version in "${versions[@]}"; do
 	(
 		set -x
 		sed -ri '
-			s/^(ENV PHP_VERSION) .*/\1 '"$fullVersion"'/;
-			s/^(ENV PHP_FILENAME) .*/\1 '"$filename"'/;
-			s/^(ENV PHP_SHA256) .*/\1 '"$sha256"'/;
-			s/^(ENV GPG_KEYS) [0-9a-fA-F ]*$/\1 '"$gpgKey"'/;
-		' "$version/Dockerfile" "$version/"*/Dockerfile
+			s!%%PHP_VERSION%%!'"$fullVersion"'!;
+			s!%%PHP_FILENAME%%!'"$filename"'!;
+			s!%%PHP_SHA256%%!'"$sha256"'!;
+			s!%%GPG_KEYS%%!'"$gpgKey"'!;
+		' "${dockerfiles[@]}"
 	)
 done