diff --git a/.docker/php53/Dockerfile b/.docker/php53/Dockerfile
index 38bf19a67..daa7b9214 100644
--- a/.docker/php53/Dockerfile
+++ b/.docker/php53/Dockerfile
@@ -63,10 +63,24 @@ FROM php53
 #
 RUN set -eux; \
   \
-  pecl install apc-3.1.13; \
-  echo 'extension=apc.so' >> /usr/local/lib/php.ini; \
+  packageName=APC; \
+  packageVersion=3.1.13; \
   \
-  rm -r /tmp/pear;
+  packageFile=${packageName}-${packageVersion}.tgz; \
+  \
+  packageSha256sum=5ef8ba07729e72946e95951672a5378bed98cb5a294e79bf0f0a97ac62829abd; \
+  \
+  curl --insecure -sSLfO https://pecl.php.net/get/${packageFile}; \
+  echo "${packageSha256sum}  ${packageFile}" \
+    | sha256sum -cw --status; \
+  \
+  pecl install ${packageFile}; \
+  rm ${packageFile}; \
+  \
+  echo "extension=apc.so" >> /usr/local/lib/php.ini; \
+  \
+  rm -r /tmp/pear; \
+  :;
 
 # Install composer
 #
diff --git a/.docker/php54/Dockerfile b/.docker/php54/Dockerfile
index b330bcdb0..62a792b9a 100644
--- a/.docker/php54/Dockerfile
+++ b/.docker/php54/Dockerfile
@@ -25,14 +25,35 @@ RUN docker-php-ext-install mbstring
 # Install APC PHP extension
 #
 RUN set -eux; \
-  pecl install apc-3.1.13; \
-  docker-php-ext-enable apc; \
-  rm -r /tmp/pear;
+  \
+  packageName=APC; \
+  packageVersion=3.1.13; \
+  \
+  packageFile=${packageName}-${packageVersion}.tgz; \
+  \
+  packageSha256sum=5ef8ba07729e72946e95951672a5378bed98cb5a294e79bf0f0a97ac62829abd; \
+  \
+  curl --insecure -sSLfO https://pecl.php.net/get/${packageFile}; \
+  echo "${packageSha256sum}  ${packageFile}" \
+    | sha256sum -cw --status; \
+  \
+  pecl install ${packageFile}; \
+  rm ${packageFile}; \
+  \
+  echo "extension=apc.so" >> /usr/local/lib/php.ini; \
+  \
+  rm -r /tmp/pear; \
+  :;
 
 # Install memcache PHP extension
 #
 ARG MEMCACHE_VERSION
 RUN set -eux; \
+  \
+  if test x"3.0.8" = x"${MEMCACHE_VERSION}"; then \
+      packageSha256sum=2cae5b423ffbfd33a259829849f6000d4db018debe3e29ecf3056f06642e8311; \
+  else :; fi; \
+  \
   buildDeps=' \
     libzip-dev \
   '; \
@@ -41,7 +62,13 @@ RUN set -eux; \
     $buildDeps \
   ; \
   \
-  pecl install memcache-${MEMCACHE_VERSION}; \
+  curl --insecure -sSLfO https://pecl.php.net/get/memcache-${MEMCACHE_VERSION}.tgz; \
+  echo "${packageSha256sum}  memcache-${MEMCACHE_VERSION}.tgz" \
+    | sha256sum -cw --status; \
+  \
+  pecl install memcache-${MEMCACHE_VERSION}.tgz; \
+  rm memcache-${MEMCACHE_VERSION}.tgz; \
+  \
   docker-php-ext-enable memcache; \
   \
   apt-get purge -y --force-yes --auto-remove -o APT::AutoRemove::RecommendsImportant=true \
diff --git a/.docker/php55_71/Dockerfile b/.docker/php55_71/Dockerfile
index 9438ad49f..d2e7151cd 100644
--- a/.docker/php55_71/Dockerfile
+++ b/.docker/php55_71/Dockerfile
@@ -28,17 +28,40 @@ RUN docker-php-ext-install mbstring
 ARG APCU_VERSION
 RUN set -eux; \
   \
-  test x"" = x"${APCU_VERSION}" || { \
-    pecl install apcu-${APCU_VERSION}; \
-    docker-php-ext-enable apcu; \
-    \
-    rm -r /tmp/pear; \
-  }
+  if test x"" = x"${APCU_VERSION}"; then \
+    return 0; \
+  else :; fi; \
+  \
+  packageName=apcu; \
+  packageVersion=${APCU_VERSION}; \
+  \
+  packageFile=${packageName}-${packageVersion}.tgz; \
+  \
+  if test x"4.0.11" = x"${packageVersion}"; then \
+    packageSha256sum=454f302ec13a6047ca4c39e081217ce5a61bbea815aec9c1091fb849e70b4d00; \
+  else :; fi; \
+  \
+  if test x"5.1.23" = x"${packageVersion}"; then \
+    packageSha256sum=454f302ec13a6047ca4c39e081217ce5a61bbea815aec9c1091fb849e70b4d00; \
+  else :; fi; \
+  \
+  curl --insecure -sSLfO https://pecl.php.net/get/${packageFile}; \
+  echo "${packageSha256sum}  ${packageFile}" \
+    | sha256sum -cw --status; \
+  \
+  pecl install ${packageFile}; \
+  rm ${packageFile}; \
+  \
+  docker-php-ext-enable ${packageName}; \
+  \
+  rm -r /tmp/pear; \
+  :;
 
 # Install memcache PHP extension
 #
 ARG MEMCACHE_VERSION
 RUN set -eux; \
+  \
   buildDeps=' \
     libzip-dev \
   '; \
@@ -47,8 +70,26 @@ RUN set -eux; \
     $buildDeps \
   ; \
   \
-  pecl install memcache-${MEMCACHE_VERSION}; \
-  docker-php-ext-enable memcache; \
+  packageName=memcache; \
+  packageVersion=${MEMCACHE_VERSION}; \
+  \
+  packageFile=${packageName}-${packageVersion}.tgz; \
+  \
+  if test x"4.0.5.2" = x"${packageVersion}"; then \
+    packageSha256sum=7b7667813baea003671f174bbec849e43ff235a8ea4ab7e36c3a0380c2a9ed63; \
+  else :; fi; \
+  if test x"3.0.8" = x"${packageVersion}"; then \
+    packageSha256sum=2cae5b423ffbfd33a259829849f6000d4db018debe3e29ecf3056f06642e8311; \
+  else :; fi; \
+  \
+  curl --insecure -sSLfO https://pecl.php.net/get/${packageFile}; \
+  echo "${packageSha256sum}  ${packageFile}" \
+    | sha256sum -cw --status; \
+  \
+  pecl install ${packageFile}; \
+  rm ${packageFile}; \
+  \
+  docker-php-ext-enable ${packageName}; \
   \
   apt-get purge -y --force-yes --auto-remove -o APT::AutoRemove::RecommendsImportant=true \
     $buildDeps \
diff --git a/.docker/php72_73/Dockerfile b/.docker/php72_73/Dockerfile
index 8e8864668..fad3d7217 100644
--- a/.docker/php72_73/Dockerfile
+++ b/.docker/php72_73/Dockerfile
@@ -10,17 +10,36 @@ RUN docker-php-ext-install mbstring
 ARG APCU_VERSION
 RUN set -eux; \
   \
-  test x"" = x"${APCU_VERSION}" || { \
-    pecl install apcu-${APCU_VERSION}; \
-    docker-php-ext-enable apcu; \
-    \
-    rm -r /tmp/pear; \
-  }
+  if test x"" = x"${APCU_VERSION}"; then \
+    return 0; \
+  else :; fi; \
+  \
+  packageName=apcu; \
+  packageVersion=${APCU_VERSION}; \
+  \
+  packageFile=${packageName}-${packageVersion}.tgz; \
+  \
+  if test x"5.1.23" = x"${packageVersion}"; then \
+    packageSha256sum=454f302ec13a6047ca4c39e081217ce5a61bbea815aec9c1091fb849e70b4d00; \
+  else :; fi; \
+  \
+  curl --insecure -sSLfO https://pecl.php.net/get/${packageFile}; \
+  echo "${packageSha256sum}  ${packageFile}" \
+    | sha256sum -cw --status; \
+  \
+  pecl install ${packageFile}; \
+  rm ${packageFile}; \
+  \
+  docker-php-ext-enable ${packageName}; \
+  \
+  rm -r /tmp/pear; \
+  :;
 
 # Install memcache PHP extension
 #
 ARG MEMCACHE_VERSION
 RUN set -eux; \
+  \
   buildDeps=' \
     libzip-dev \
   '; \
@@ -29,8 +48,23 @@ RUN set -eux; \
     $buildDeps \
   ; \
   \
-  pecl install memcache-${MEMCACHE_VERSION}; \
-  docker-php-ext-enable memcache; \
+  packageName=memcache; \
+  packageVersion=${MEMCACHE_VERSION}; \
+  \
+  packageFile=${packageName}-${packageVersion}.tgz; \
+  \
+  if test x"4.0.5.2" = x"${packageVersion}"; then \
+    packageSha256sum=7b7667813baea003671f174bbec849e43ff235a8ea4ab7e36c3a0380c2a9ed63; \
+  else :; fi; \
+  \
+  curl --insecure -sSLfO https://pecl.php.net/get/${packageFile}; \
+  echo "${packageSha256sum}  ${packageFile}" \
+    | sha256sum -cw --status; \
+  \
+  pecl install ${packageFile}; \
+  rm ${packageFile}; \
+  \
+  docker-php-ext-enable ${packageName}; \
   \
   apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=true \
     $buildDeps \
diff --git a/.docker/php74_83/Dockerfile b/.docker/php74_83/Dockerfile
index 8e134233d..3a006bba9 100644
--- a/.docker/php74_83/Dockerfile
+++ b/.docker/php74_83/Dockerfile
@@ -22,17 +22,36 @@ RUN set -eux; \
 ARG APCU_VERSION
 RUN set -eux; \
   \
-  test x"" = x"${APCU_VERSION}" || { \
-    pecl install apcu-${APCU_VERSION}; \
-    docker-php-ext-enable apcu; \
-    \
-    rm -r /tmp/pear; \
-  }
+  if test x"" = x"${APCU_VERSION}"; then \
+    return 0; \
+  else :; fi; \
+  \
+  packageName=apcu; \
+  packageVersion=${APCU_VERSION}; \
+  \
+  packageFile=${packageName}-${packageVersion}.tgz; \
+  \
+  if test x"5.1.23" = x"${packageVersion}"; then \
+    packageSha256sum=454f302ec13a6047ca4c39e081217ce5a61bbea815aec9c1091fb849e70b4d00; \
+  else :; fi; \
+  \
+  curl --insecure -sSLfO https://pecl.php.net/get/${packageFile}; \
+  echo "${packageSha256sum}  ${packageFile}" \
+    | sha256sum -cw --status; \
+  \
+  pecl install ${packageFile}; \
+  rm ${packageFile}; \
+  \
+  docker-php-ext-enable ${packageName}; \
+  \
+  rm -r /tmp/pear; \
+  :;
 
 # Install memcache PHP extension
 #
 ARG MEMCACHE_VERSION
 RUN set -eux; \
+  \
   buildDeps=' \
     libzip-dev \
   '; \
@@ -41,8 +60,31 @@ RUN set -eux; \
     $buildDeps \
   ; \
   \
-  pecl install memcache-${MEMCACHE_VERSION}; \
-  docker-php-ext-enable memcache; \
+  packageName=memcache; \
+  packageVersion=${MEMCACHE_VERSION}; \
+  \
+  packageFile=${packageName}-${packageVersion}.tgz; \
+  \
+  if test x"4.0.5.2" = x"${packageVersion}"; then \
+      packageSha256sum=7b7667813baea003671f174bbec849e43ff235a8ea4ab7e36c3a0380c2a9ed63; \
+  else :; fi; \
+  \
+  if test x"8.0" = x"${packageVersion}"; then \
+      packageSha256sum=defe33e6f7831d82b7283b95e14a531070531acbf21278f3f0d7050505cf3395; \
+  else :; fi; \
+  \
+  if test x"8.2" = x"${packageVersion}"; then \
+      packageSha256sum=b3f0640eacdeb9046c6c86a1546d7fb8a4e9f219e5d9a36a287e59b2dd8208e5; \
+  else :; fi; \
+  \
+  curl --insecure -sSLfO https://pecl.php.net/get/${packageFile}; \
+  echo "${packageSha256sum}  ${packageFile}" \
+    | sha256sum -cw --status; \
+  \
+  pecl install ${packageFile}; \
+  rm ${packageFile}; \
+  \
+  docker-php-ext-enable ${packageName}; \
   \
   apt-get purge -y --force-yes --auto-remove -o APT::AutoRemove::RecommendsImportant=true \
     $buildDeps \