diff --git a/README.md b/README.md
new file mode 100644
index 0000000..33335a3
--- /dev/null
+++ b/README.md
@@ -0,0 +1,107 @@
+# Easy installation of PHP extensions in official PHP Docker images
+
+This repository contains a script that can be used to easily install a PHP extension inside the [official PHP Docker images](https://hub.docker.com/_/php/).
+
+## Known limits
+
+Currently the script requires the Debian-based images (no Alpine).
+
+
+## Usage
+
+Here's a sample Dockerfile that installs the GD and xdedub extensions inside a docker image:
+
+```
+FROM php:7.2-cli
+
+ADD https://raw.githubusercontent.com/mlocati/docker-php-extension-installer/master/install-php-extensions /usr/local/bin/
+
+RUN install-php-extensions gd xdebug
+```
+
+## Supported PHP extensions
+
+<!-- START OF EXTENSIONS TABLE -->
+<!-- ########################################################### -->
+<!-- #                                                         # -->
+<!-- #  DO NOT EDIT THIS TABLE: IT IS GENERATED AUTOMATICALLY  # -->
+<!-- #                                                         # -->
+<!-- #  EDIT THE data/supported-extensions FILE INSTEAD        # -->
+<!-- #                                                         # -->
+<!-- ########################################################### -->
+| Extension | PHP 5.6 | PHP 7.0 | PHP 7.1 | PHP 7.2 |
+|:---:|:---:|:---:|:---:|:---:|
+| apcu |  | V | V | V |
+| bcmath | V | V | V | V |
+| bz2 | V | V | V | V |
+| calendar | V | V | V | V |
+| cmark |  | V | V | V |
+| dba | V | V | V | V |
+| enchant | V | V | V | V |
+| exif | V | V | V | V |
+| gd | V | V | V | V |
+| gettext | V | V | V | V |
+| gmp | V | V | V | V |
+| imagick | V | V | V | V |
+| imap | V | V | V | V |
+| interbase | V | V | V | V |
+| intl | V | V | V | V |
+| ldap | V | V | V | V |
+| mcrypt | V | V | V |  |
+| memcache | V |  |  |  |
+| memcached | V | V | V | V |
+| mysql | V |  |  |  |
+| mysqli | V | V | V | V |
+| odbc | V | V | V | V |
+| opcache | V | V | V | V |
+| pcntl | V | V | V | V |
+| pdo_dblib | V | V | V | V |
+| pdo_firebird | V | V | V | V |
+| pdo_mysql | V | V | V | V |
+| pdo_odbc | V | V | V | V |
+| pdo_pgsql | V | V | V | V |
+| pdo_sqlsrv |  | V | V | V |
+| pgsql | V | V | V | V |
+| pspell | V | V | V | V |
+| pthreads | V | V |  |  |
+| recode | V | V | V | V |
+| redis | V | V | V | V |
+| shmop | V | V | V | V |
+| snmp | V | V | V | V |
+| soap | V | V | V | V |
+| sockets | V | V | V | V |
+| solr | V | V | V |  |
+| sqlsrv |  | V | V | V |
+| ssh2 | V | V | V | V |
+| sybase_ct | V |  |  |  |
+| sysvmsg | V | V | V | V |
+| sysvsem | V | V | V | V |
+| sysvshm | V | V | V | V |
+| tidy | V | V | V | V |
+| timezonedb | V | V | V | V |
+| uuid | V | V | V | V |
+| wddx | V | V | V | V |
+| xdebug | V | V | V | V |
+| xmlrpc | V | V | V | V |
+| xsl | V | V | V | V |
+| yaml | V | V | V | V |
+| zip | V | V | V | V |
+<!-- END OF EXTENSIONS TABLE -->
+
+
+## Special requirements
+
+Some extension has special requirements:
+
+<!-- START OF SPECIAL REQUIREMENTS -->
+<!-- ########################################################### -->
+<!-- #                                                         # -->
+<!-- #  DO NOT EDIT THIS TABLE: IT IS GENERATED AUTOMATICALLY  # -->
+<!-- #                                                         # -->
+<!-- #  EDIT THE data/special-requirements FILE INSTEAD        # -->
+<!-- #                                                         # -->
+<!-- ########################################################### -->
+| Extension | Requirements |
+|:---:|:---:|
+| pthreads | Requires images with PHP compiled with thread-safety enabled (`zts`). |
+<!-- END OF SPECIAL REQUIREMENTS -->
diff --git a/data/special-requirements b/data/special-requirements
new file mode 100644
index 0000000..b3fc69e
--- /dev/null
+++ b/data/special-requirements
@@ -0,0 +1 @@
+pthreads zts
\ No newline at end of file
diff --git a/data/supported-extensions b/data/supported-extensions
new file mode 100644
index 0000000..5845a78
--- /dev/null
+++ b/data/supported-extensions
@@ -0,0 +1,55 @@
+apcu 7.0 7.1 7.2
+bcmath 5.6 7.0 7.1 7.2
+bz2 5.6 7.0 7.1 7.2
+calendar 5.6 7.0 7.1 7.2
+cmark 7.0 7.1 7.2
+dba 5.6 7.0 7.1 7.2
+enchant 5.6 7.0 7.1 7.2
+exif 5.6 7.0 7.1 7.2
+gd 5.6 7.0 7.1 7.2
+gettext 5.6 7.0 7.1 7.2
+gmp 5.6 7.0 7.1 7.2
+imagick 5.6 7.0 7.1 7.2
+imap 5.6 7.0 7.1 7.2
+interbase 5.6 7.0 7.1 7.2
+intl 5.6 7.0 7.1 7.2
+ldap 5.6 7.0 7.1 7.2
+mcrypt 5.6 7.0 7.1
+memcache 5.6
+memcached 5.6 7.0 7.1 7.2
+mysql 5.6
+mysqli 5.6 7.0 7.1 7.2
+odbc 5.6 7.0 7.1 7.2
+opcache 5.6 7.0 7.1 7.2
+pcntl 5.6 7.0 7.1 7.2
+pdo_dblib 5.6 7.0 7.1 7.2
+pdo_firebird 5.6 7.0 7.1 7.2
+pdo_mysql 5.6 7.0 7.1 7.2
+pdo_odbc 5.6 7.0 7.1 7.2
+pdo_pgsql 5.6 7.0 7.1 7.2
+pdo_sqlsrv 7.0 7.1 7.2
+pgsql 5.6 7.0 7.1 7.2
+pspell 5.6 7.0 7.1 7.2
+pthreads 5.6 7.0
+recode 5.6 7.0 7.1 7.2
+redis 5.6 7.0 7.1 7.2
+shmop 5.6 7.0 7.1 7.2
+snmp 5.6 7.0 7.1 7.2
+soap 5.6 7.0 7.1 7.2
+sockets 5.6 7.0 7.1 7.2
+solr 5.6 7.0 7.1
+sqlsrv 7.0 7.1 7.2
+ssh2 5.6 7.0 7.1 7.2
+sybase_ct 5.6
+sysvmsg 5.6 7.0 7.1 7.2
+sysvsem 5.6 7.0 7.1 7.2
+sysvshm 5.6 7.0 7.1 7.2
+tidy 5.6 7.0 7.1 7.2
+timezonedb 5.6 7.0 7.1 7.2
+uuid 5.6 7.0 7.1 7.2
+wddx 5.6 7.0 7.1 7.2
+xdebug 5.6 7.0 7.1 7.2
+xmlrpc 5.6 7.0 7.1 7.2
+xsl 5.6 7.0 7.1 7.2
+yaml 5.6 7.0 7.1 7.2
+zip 5.6 7.0 7.1 7.2
diff --git a/install-php-extensions b/install-php-extensions
new file mode 100755
index 0000000..42a17ad
--- /dev/null
+++ b/install-php-extensions
@@ -0,0 +1,481 @@
+#!/bin/sh
+
+# This script wraps docker-php-ext-install, properly configuring the system.
+#
+# Copyright (c) Michele Locati, 2018
+#
+# MIT license
+
+# Let's set a sane environment
+set -o errexit
+set -o nounset
+
+# Reset the Internal Field Separator
+resetIFS () {
+	IFS='	 
+'
+}
+
+# Get the PHP Major-Minor version as an integer value, in format MMmm (example: 506 for PHP 5.6.15)
+#
+# Output:
+#   The PHP numeric Major-Minor version
+getPHPMajorMinor () {
+	php -r '$v = explode(".", PHP_VERSION); echo $v[0] * 100 + $v[1];'
+}
+
+# Get the normalized list of already installed PHP modules
+#
+# Output:
+#   Space-separated list of module handles
+getPHPInstalledModules () {
+	getPHPInstalledModules_result=''
+	IFS='
+'
+	for getPHPInstalledModules_module in $(php -m)
+	do
+		getPHPInstalledModules_moduleNormalized=''
+		case "${getPHPInstalledModules_module}" in
+			\[PHP\ Modules\])
+				;;
+			\[Zend\ Modules\])
+				break
+				;;
+			Core|PDO|PDO_*|Phar|Reflection|SimpleXML|SPL|SQLite|Xdebug)
+				getPHPInstalledModules_moduleNormalized=$(LC_CTYPE=C printf '%s' "${getPHPInstalledModules_module}" | tr '[:upper:]' '[:lower:]')
+				;;
+			Zend\ OPcache)
+				getPHPInstalledModules_moduleNormalized='opcache'
+				;;
+			*\ *|A*|*B*|*C*|*D*|*E*|*F*|*G*|*H*|*I*|*J*|*K*|*L*|*M*|*N*|*O*|*P*|*Q*|*R*|*S*|*T*|*U*|*V*|*W*|*X*|*Y*|*Z*)
+				printf '### WARNING Unrecognized module name: %s ###\n' "${getPHPInstalledModules_module}" >&2
+				;;
+			*)
+				getPHPInstalledModules_moduleNormalized="${getPHPInstalledModules_module}"
+				;;
+		esac
+		if test -n "${getPHPInstalledModules_moduleNormalized}"
+		then
+			if ! stringInList "${getPHPInstalledModules_moduleNormalized}" "${getPHPInstalledModules_result}"
+			then
+				getPHPInstalledModules_result="${getPHPInstalledModules_result} ${getPHPInstalledModules_moduleNormalized}"
+			fi
+		fi
+	done
+	resetIFS
+	printf '%s' "${getPHPInstalledModules_result}"
+}
+
+# Get the handles of the modules to be installed
+#
+# Arguments:
+#   $@: all module handles
+# Output:
+#   Space-separated list of module handles
+getModulesToInstall () {
+	getModulesToInstall_alreadyInstalled="$(getPHPInstalledModules)"
+	getModulesToInstall_result=''
+	while :
+	do
+		if test $# -lt 1
+		then
+			break
+		fi
+		if stringInList "${1}" "${getModulesToInstall_result}"
+		then
+			printf '### WARNING Duplicated module name specified: %s ###\n' "${1}" >&2
+		elif stringInList "${1}" "${getModulesToInstall_alreadyInstalled}"
+		then
+			printf '### WARNING Module already installed: %s ###\n' "${1}" >&2
+		else
+			getModulesToInstall_result="${getModulesToInstall_result} ${1}"
+		fi
+		shift
+	done
+	printf '%s' "${getModulesToInstall_result}"
+}
+
+# Get the required APT packages for a specific PHP version and for the list of module handles
+#
+# Arguments:
+#   $1: the numeric PHP Major-Minor version
+#   $@: the PHP module handles
+#
+# Output:
+#   Space-separated list of APT packages
+getRequiredAptPackages () {
+	getRequiredAptPackages_result=''
+	getRequiredAptPackages_phpv=${1}
+	while :
+	do
+		if test $# -lt 2
+		then
+			break
+		fi
+		shift
+		case "${1}" in
+			bz2)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} libbz2-dev"
+				;;
+			cmark)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} cmake"
+				;;
+			enchant)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} libenchant-dev"
+				;;
+			gd)
+				if test $getRequiredAptPackages_phpv -lt 700
+				then
+					getRequiredAptPackages_result="${getRequiredAptPackages_result} libvpx-dev libjpeg62-turbo-dev libpng-dev libxpm-dev libfreetype6-dev"
+				else
+					getRequiredAptPackages_result="${getRequiredAptPackages_result} libwebp-dev libjpeg62-turbo-dev libpng-dev libxpm-dev libfreetype6-dev"
+				fi
+				;;
+			gmp)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} libgmp-dev"
+				;;
+			imap)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} libc-client-dev libkrb5-dev"
+				;;
+			interbase)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} firebird-dev libib-util"
+				;;
+			imagick)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} libmagickwand-dev"
+				;;
+			intl)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} libicu-dev"
+				;;
+			ldap)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} libldap2-dev"
+				;;
+			memcache)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} zlib1g-dev"
+				;;
+			memcached)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} libmemcached-dev zlib1g-dev"
+				;;
+			mcrypt)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} libmcrypt-dev"
+				;;
+			mssql)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} freetds-dev"
+				;;
+			odbc)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} unixodbc-dev"
+				;;
+			pdo_dblib)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} freetds-dev"
+				;;
+			pdo_firebird)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} firebird-dev libib-util"
+				;;
+			pdo_pgsql)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} libpq-dev"
+				;;
+			pdo_odbc)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} unixodbc-dev"
+				;;
+			pdo_sqlsrv)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} unixodbc-dev"
+				;;
+			pgsql)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} libpq-dev"
+				;;
+			pspell)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} libpspell-dev"
+				;;
+			recode)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} librecode-dev"
+				;;
+			ssh2)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} libssh2-1-dev"
+				;;
+			snmp)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} snmp libsnmp-dev"
+				;;
+			soap)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} libxml2-dev"
+				;;
+			solr)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} libcurl4-gnutls-dev libxml2-dev"
+				;;
+			sqlsrv)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} unixodbc-dev"
+				;;
+			sybase_ct)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} freetds-dev"
+				;;
+			tidy)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} libtidy-dev"
+				;;
+			uuid)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} uuid-dev"
+				;;
+			wddx)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} libxml2-dev"
+				;;
+			xmlrpc)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} libxml2-dev"
+				;;
+			xsl)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} libxslt-dev"
+				;;
+			yaml)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} libyaml-dev"
+				;;
+			zip)
+				getRequiredAptPackages_result="${getRequiredAptPackages_result} zlib1g-dev"
+				;;
+		esac
+	done
+	printf '%s' "${getRequiredAptPackages_result}"
+}
+
+# Install a bundled PHP module given its handle
+#
+# Arguments:
+#   $1: the numeric PHP Major-Minor version
+#   $2: the handle of the PHP module
+installBundledModule () {
+	printf '### INSTALLING BUNDLED MODULE %s ###\n' "${2}"
+	case "${2}" in
+		gd)
+			if test $1 -lt 700
+			then
+				docker-php-ext-configure gd --with-gd --with-vpx-dir --with-jpeg-dir --with-png-dir --with-zlib-dir --with-xpm-dir --with-freetype-dir --enable-gd-native-ttf
+			elif test $1 -lt 702
+			then
+				docker-php-ext-configure gd --with-gd --with-webp-dir --with-jpeg-dir --with-png-dir --with-zlib-dir --with-xpm-dir --with-freetype-dir --enable-gd-native-ttf
+			else
+				docker-php-ext-configure gd --with-gd --with-webp-dir --with-jpeg-dir --with-png-dir --with-zlib-dir --with-xpm-dir --with-freetype-dir
+			fi
+			;;
+		gmp)
+			case "$1" in
+				506)
+					if ! test -f /usr/include/gmp.h
+					then
+						ln -s /usr/include/x86_64-linux-gnu/gmp.h /usr/include/gmp.h
+					fi
+					;;
+			esac
+			;;
+		imap)
+			docker-php-ext-configure imap --with-kerberos --with-imap-ssl
+			;;
+		ldap)
+			docker-php-ext-configure ldap --with-libdir=lib/x86_64-linux-gnu
+			;;
+		mssql|pdo_dblib)
+			case "$1" in
+				506|700|701|702)
+					if ! test -f /usr/lib/libsybdb.so
+					then
+						ln -s /usr/lib/x86_64-linux-gnu/libsybdb.so /usr/lib/libsybdb.so
+					fi
+					;;
+			esac
+			;;
+		odbc)
+			case "$1" in
+				506|700|701|702)
+					docker-php-source extract
+					cd /usr/src/php/ext/odbc
+					phpize
+					sed -ri 's@^ *test +"\$PHP_.*" *= *"no" *&& *PHP_.*=yes *$@#&@g' configure
+					./configure --with-unixODBC=shared,/usr
+					cd -
+					;;
+			esac
+			;;
+		pdo_odbc)
+			docker-php-ext-configure pdo_odbc --with-pdo-odbc=unixODBC,/usr
+			;;
+		sybase_ct)
+			docker-php-ext-configure sybase_ct --with-sybase-ct=/usr
+			;;
+	esac
+	docker-php-ext-install "${2}"
+}
+
+# Fetch a tar.gz file, extract it and returns the path of the extracted folder.
+#
+# Arguments:
+#   $1: the URL of the file to be downloaded
+#
+# Output:
+#   The path of the extracted directory
+getPackageSource () {
+	mkdir -p /tmp/src
+	getPackageSource_tempFile=$(mktemp -p /tmp/src)
+	curl -L -s -S -o "${getPackageSource_tempFile}" "$1"
+	getPackageSource_tempDir=$(mktemp -p /tmp/src -d)
+	cd "${getPackageSource_tempDir}"
+	tar -xzf "${getPackageSource_tempFile}"
+	cd - >/dev/null
+	unlink "${getPackageSource_tempFile}"
+	getPackageSource_outDir=''
+	for getPackageSource_i in $(ls "${getPackageSource_tempDir}")
+	do
+		if test -n "${getPackageSource_outDir}" -o -f "${getPackageSource_tempDir}/${getPackageSource_i}"
+		then
+			getPackageSource_outDir=''
+			break
+		fi
+		getPackageSource_outDir="${getPackageSource_tempDir}/${getPackageSource_i}"
+	done
+	if test -n "${getPackageSource_outDir}"
+	then
+		printf '%s' "${getPackageSource_outDir}"
+	else
+		printf '%s' "${getPackageSource_tempDir}"
+	fi
+}
+
+# Install a PHP module given its handle from source code
+#
+# Arguments:
+#   $1: the handle of the PHP module
+#   $2: the URL of the module source code
+#   $3: the options of the configure command
+installModuleFromSource () {
+	printf '### INSTALLING MODULE %s FROM SOURCE CODE ###\n' "${1}"
+	installModuleFromSource_dir="$(getPackageSource "${2}")"
+	cd "${installModuleFromSource_dir}"
+	phpize
+	./configure ${3}
+	make -j$(nproc) install
+	cd --
+	docker-php-ext-enable "${1}"
+}
+
+# Install a PECL PHP module given its handle
+#
+# Arguments:
+#   $1: the numeric PHP Major-Minor version
+#   $2: the handle of the PHP module
+installPECLModule () {
+	printf '### INSTALLING PECL MODULE %s ###\n' "${2}"
+	installPECLModule_actual="${2}"
+	case "${2}" in
+		memcached)
+			if test $1 -lt 700
+			then
+				installPECLModule_actual="${2}-2.2.0"
+			fi
+			;;
+		pthreads)
+			if test $1 -lt 700
+			then
+				installPECLModule_actual="${2}-2.0.10"
+			fi
+			;;
+		ssh2)
+			if test $1 -ge 700
+			then
+				installPECLModule_actual="${2}-1.1.2"
+			fi
+			;;
+		xdebug)
+			if test $1 -lt 501
+			then
+				installPECLModule_actual="${2}-2.0.5"
+			elif test $1 -lt 504
+			then
+				installPECLModule_actual="${2}-2.2.7"
+			elif test $1 -lt 505
+			then
+				installPECLModule_actual="${2}-2.4.1"
+			elif test $1 -lt 700
+			then
+				installPECLModule_actual="${2}-2.5.5"
+			fi
+			;;
+		yaml)
+			if test $1 -lt 700
+			then
+				installPECLModule_actual="${2}-1.3.1"
+			fi
+			;;
+	esac
+	if test "${2}" != "${installPECLModule_actual}"
+	then
+		printf '  (installing version %s)\n' "${installPECLModule_actual}"
+	fi
+	pecl install "${installPECLModule_actual}"
+	docker-php-ext-enable "${2}"
+}
+
+# Check if a string is in a list of space-separated string
+#
+# Arguments:
+#   $1: the string to be checked
+#   $2: the string list
+#
+# Return:
+#   0 (true): if the string is in the list
+#   1 (false): if the string is not in the list
+stringInList () {
+	for stringInList_listItem in ${2}
+	do
+		if test "${1}" = "${stringInList_listItem}"
+		then
+			return 0
+		fi
+	done
+	return 1
+}
+
+resetIFS
+TEMPORARY_DIRS=''
+PHP_MAJMIN_VERSION=$(getPHPMajorMinor)
+case "${PHP_MAJMIN_VERSION}" in
+	506|700|701|702)
+		;;
+	*)
+		printf "### ERROR: Unsupported PHP version: %s.%s ###\n" $(( PHP_MAJMIN_VERSION / 100 )) $(( PHP_MAJMIN_VERSION % 100 ))
+esac
+PHP_MODULES_TO_INSTALL=$(getModulesToInstall "$@")
+if test -n "${PHP_MODULES_TO_INSTALL}"
+then
+	REQUIRED_APT_PACKAGES=$(getRequiredAptPackages ${PHP_MAJMIN_VERSION} ${PHP_MODULES_TO_INSTALL})
+	if test -n "${REQUIRED_APT_PACKAGES}"
+	then
+		printf '### INSTALLING REQUIRED APT PACKAGES ###\n'
+		DEBIAN_FRONTEND=noninteractive apt-get update -y
+		DEBIAN_FRONTEND=noninteractive apt-get install -y ${REQUIRED_APT_PACKAGES}
+	fi
+	docker-php-source extract
+	BUNDLED_MODULES="$(find /usr/src/php/ext -mindepth 2 -maxdepth 2 -type f -name 'config.m4' | xargs -n1 dirname | xargs -n1 basename | xargs)"
+	for PHP_MODULE_TO_INSTALL in ${PHP_MODULES_TO_INSTALL}
+	do
+		if stringInList "${PHP_MODULE_TO_INSTALL}" "${BUNDLED_MODULES}"
+		then
+			installBundledModule ${PHP_MAJMIN_VERSION} "${PHP_MODULE_TO_INSTALL}"
+		else
+			MODULE_SOURCE=''
+			MODULE_SOURCE_CONFIGOPTIONS=''
+			case "${PHP_MODULE_TO_INSTALL}" in
+				cmark)
+					MODULE_SOURCE=https://github.com/krakjoe/cmark/archive/v1.0.0.tar.gz
+					cd "$(getPackageSource https://github.com/commonmark/cmark/archive/0.28.3.tar.gz)"
+					make install
+					cd -
+					MODULE_SOURCE_CONFIGOPTIONS=--with-cmark
+					;;
+			esac
+			if test -n "${MODULE_SOURCE}"
+			then
+				installModuleFromSource "${PHP_MODULE_TO_INSTALL}" "${MODULE_SOURCE}" "${MODULE_SOURCE_CONFIGOPTIONS}"
+			else
+				installPECLModule ${PHP_MAJMIN_VERSION} "${PHP_MODULE_TO_INSTALL}"
+			fi
+		fi
+	done
+fi
+
+docker-php-source delete
+rm -rf /tmp/pear
+rm -rf /var/lib/apt/lists/*
+#rm -rf /tmp/src
diff --git a/scripts/common b/scripts/common
new file mode 100755
index 0000000..b19af4f
--- /dev/null
+++ b/scripts/common
@@ -0,0 +1,28 @@
+#!/bin/sh
+
+# Reset the Internal Field Separator
+resetIFS () {
+	IFS='	 
+'
+}
+
+# Check if a string is in a list of space-separated string
+#
+# Arguments:
+# $1: the string to be checked
+# $2: the string list
+#
+# Return:
+# 0 (true): if the string is in the list
+# 1 (false): if the string is not in the list
+stringInList () {
+	resetIFS
+	for stringInList_listItem in ${2}
+	do
+		if test "${1}" = "${stringInList_listItem}"
+		then
+			return 0
+		fi
+	done
+	return 1
+}
diff --git a/scripts/update-readme b/scripts/update-readme
new file mode 100755
index 0000000..b201308
--- /dev/null
+++ b/scripts/update-readme
@@ -0,0 +1,242 @@
+#!/bin/sh
+
+set -o errexit
+set -o nounset
+
+SCRIPTS_DIR="$(CDPATH= cd -- "$(dirname -- "${0}")" && pwd)"
+ROOT_DIR="$(dirname -- "${SCRIPTS_DIR}")"
+DATA_DIR="${ROOT_DIR}/data"
+
+. "${SCRIPTS_DIR}/common"
+
+
+# Get the list of PHP extensions from the data file
+#
+# Arguments:
+# $1: the path to the data file
+#
+# Output:
+# the list of PHP extensions
+getExtensionList () {
+	getExtensionList_extensions=''
+	IFS='
+'
+	for getExtensionList_line in $(cat -- "${1}" | sort)
+	do
+		getExtensionList_extension=''
+		IFS=' 	'
+		for getExtensionList_chunk in ${getExtensionList_line}
+		do
+			if test -z "${getExtensionList_extensions}"
+			then
+				getExtensionList_extensions="${getExtensionList_chunk}"
+			else
+				getExtensionList_extensions="${getExtensionList_extensions} ${getExtensionList_chunk}"
+			fi
+			break
+		done
+	done
+	printf '%s' "${getExtensionList_extensions}"
+}
+
+
+# Get the list of PHP versions from the data file
+#
+# Arguments:
+# $1: the path to the data file
+#
+# Output:
+# the list of PHP versions
+getVersionList () {
+	getVersionList_versions=''
+	IFS='
+'
+	for getVersionList_line in $(cat -- "${1}" | sort)
+	do
+		getVersionList_extension=''
+		IFS=' 	'
+		for getVersionList_chunk in ${getVersionList_line}
+		do
+			if test -z "${getVersionList_extension}"
+			then
+				getVersionList_extension="${getVersionList_chunk}"
+			elif test -z "${getVersionList_versions}"
+			then
+				getVersionList_versions="${getVersionList_chunk}"
+			elif ! stringInList "${getVersionList_chunk}" "${getVersionList_versions}"
+			then
+				getVersionList_versions="${getVersionList_versions} ${getVersionList_chunk}"
+			fi
+		done
+	done
+	sortVersionList "${getVersionList_versions}"
+}
+
+
+# Sort the list of PHP versions
+#
+# Arguments:
+# $1: the list of PHP versions
+#
+# Output:
+# the sorted list of PHP versions
+sortVersionList () {
+	sortVersionList_list=''
+	IFS='
+'
+	for sortVersionList_version in $(printf '%s' "${1}" | tr ' ' '\n' | sort -t '.' -k 1,1n -k 2,2n -k 3,3n)
+	do
+		if test -z "${sortVersionList_list}"
+		then
+			sortVersionList_list="${sortVersionList_version}"
+		else
+			sortVersionList_list="${sortVersionList_list} ${sortVersionList_version}"
+		fi
+	done
+	printf '%s' "${sortVersionList_list}"
+}
+
+
+# Generate the markdown table with the supported PHP extensions
+#
+# Arguments:
+# $1: the path to the data file
+#
+# Output:
+# the markdown table
+generateExtensionsTable () {
+	generateExtensionsTable_data=$(cat "${1}")
+	generateExtensionsTable_extensions="$(getExtensionList "${1}")"
+	generateExtensionsTable_versions="$(getVersionList "${1}")"
+	printf '| Extension |'
+	IFS=' '
+	for generateExtensionsTable_version in ${generateExtensionsTable_versions}
+	do
+		printf ' PHP %s |' "${generateExtensionsTable_version}"
+	done
+	printf '\n'
+	printf '|:---:|'
+	for generateExtensionsTable_version in ${generateExtensionsTable_versions}
+	do
+		printf -- ':---:|'
+	done
+	printf '\n'
+	IFS=' '
+	for generateExtensionsTable_extension in ${generateExtensionsTable_extensions}
+	do
+		printf '| %s |' "${generateExtensionsTable_extension}"
+		IFS=' '
+		for generateExtensionsTable_version in ${generateExtensionsTable_versions}
+		do
+			printf ' '
+			generateExtensionsTable_versionOk=''
+			IFS='
+'
+			for generateExtensionsTable_dataLine in ${generateExtensionsTable_data}
+			do
+				if stringInList "${generateExtensionsTable_extension}" "${generateExtensionsTable_dataLine}"
+				then
+					if stringInList "${generateExtensionsTable_version}" "${generateExtensionsTable_dataLine}"
+					then
+						generateExtensionsTable_versionOk='y'
+					fi
+					break
+				fi
+			done
+			if test -n "${generateExtensionsTable_versionOk}"
+			then
+				printf 'V'
+			fi
+			printf ' |'
+		done
+		printf '\n'
+	done
+}
+
+
+# Generate the markdown table with the special requirements for the PHP extensions
+#
+# Arguments:
+# $1: the path to the data file
+#
+# Output:
+# the markdown table
+generateSpecialRequirementsTable () {
+	generateSpecialRequirementsTable_started=''
+	IFS='
+'
+	for generateSpecialRequirementsTable_line in $(cat -- "${1}" | sort)
+	do
+		if test -z "${generateSpecialRequirementsTable_started}"
+		then
+			printf '| Extension | Requirements |\n'
+			printf '|:---:|:---:|\n'
+		fi
+		resetIFS
+		generateSpecialRequirementsTable_requirement="$(echo "${generateSpecialRequirementsTable_line}" | sed -E 's/^\s*\w+\s+//')"
+		case "${generateSpecialRequirementsTable_requirement}" in
+			zts)
+				generateSpecialRequirementsTable_requirement='Requires images with PHP compiled with thread-safety enabled (`zts`).'
+				;;
+		esac
+		printf '| %s | %s |\n' \
+			"$(echo "${generateSpecialRequirementsTable_line}" | awk '{print $1;}')" \
+			"${generateSpecialRequirementsTable_requirement}"
+	done
+}
+
+
+# Generate the contents of README.md
+#
+# Arguments:
+# $1: the path to the README file
+# $2: the path to the extensions data file
+# $3: the path to the special requirements data file
+#
+# Output:
+# the markdown table
+generateReadme () {
+	generateReadme_ph_ExtensionsStart='<!-- START OF EXTENSIONS TABLE -->'
+	generateReadme_ph_ExtensionsEnd='<!-- END OF EXTENSIONS TABLE -->'
+	generateReadme_ph_SpecialStart='<!-- START OF SPECIAL REQUIREMENTS -->'
+	generateReadme_ph_SpecialEnd='<!-- END OF SPECIAL REQUIREMENTS -->'
+	generateReadme_skip=''
+	while IFS= read -r generateReadme_line
+	do
+		if test "${generateReadme_line}" = "${generateReadme_ph_ExtensionsEnd}" -o "${generateReadme_line}" = "${generateReadme_ph_SpecialEnd}"
+		then
+			generateReadme_skip=''
+		fi
+		if test -z "${generateReadme_skip}"
+		then
+			printf '%s\n' "${generateReadme_line}"
+		fi
+		if test "${generateReadme_line}" = "${generateReadme_ph_ExtensionsStart}"
+		then
+			generateReadme_skip='y'
+			printf '<!-- ########################################################### -->\n'
+			printf '<!-- #                                                         # -->\n'
+			printf '<!-- #  DO NOT EDIT THIS TABLE: IT IS GENERATED AUTOMATICALLY  # -->\n'
+			printf '<!-- #                                                         # -->\n'
+			printf '<!-- #  EDIT THE data/supported-extensions FILE INSTEAD        # -->\n'
+			printf '<!-- #                                                         # -->\n'
+			printf '<!-- ########################################################### -->\n'
+			generateExtensionsTable "${2}"
+		elif test "${generateReadme_line}" = "${generateReadme_ph_SpecialStart}"
+		then
+			generateReadme_skip='y'
+			printf '<!-- ########################################################### -->\n'
+			printf '<!-- #                                                         # -->\n'
+			printf '<!-- #  DO NOT EDIT THIS TABLE: IT IS GENERATED AUTOMATICALLY  # -->\n'
+			printf '<!-- #                                                         # -->\n'
+			printf '<!-- #  EDIT THE data/special-requirements FILE INSTEAD        # -->\n'
+			printf '<!-- #                                                         # -->\n'
+			printf '<!-- ########################################################### -->\n'
+			generateSpecialRequirementsTable "${3}"
+		fi
+	done < "${1}"
+	printf '%s' "${generateReadme_line}"
+}
+
+NEW_README="$(generateReadme "${ROOT_DIR}/README.md" "${DATA_DIR}/supported-extensions" "${DATA_DIR}/special-requirements")"
+printf '%s\n' "${NEW_README}" > "${ROOT_DIR}/README.md"