diff --git a/Makefile.am b/Makefile.am
index 61f65b2fe0..17a7a95311 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -571,6 +571,57 @@ objectivec_EXTRA_DIST=                                                       \
   objectivec/Tests/UnitTests-Info.plist                                       \
   Protobuf.podspec
 
+php_EXTRA_DIST=                                              \
+  php/src/phpdoc.dist.xml                                    \
+  php/src/Google/Protobuf/Internal/DescriptorPool.php        \
+  php/src/Google/Protobuf/Internal/OneofField.php            \
+  php/src/Google/Protobuf/Internal/MapEntry.php              \
+  php/src/Google/Protobuf/Internal/Type.php                  \
+  php/src/Google/Protobuf/Internal/InputStream.php           \
+  php/src/Google/Protobuf/Internal/OutputStream.php          \
+  php/src/Google/Protobuf/Internal/MessageBuilderContext.php \
+  php/src/Google/Protobuf/Internal/MapField.php              \
+  php/src/Google/Protobuf/Internal/RepeatedField.php         \
+  php/src/Google/Protobuf/Internal/Message.php               \
+  php/src/Google/Protobuf/Internal/GPBWire.php               \
+  php/src/Google/Protobuf/Internal/GPBType.php               \
+  php/src/Google/Protobuf/Internal/GPBLabel.php              \
+  php/src/Google/Protobuf/Internal/EnumBuilderContext.php    \
+  php/src/Google/Protobuf/Internal/GPBUtil.php               \
+  php/src/Google/Protobuf/descriptor_internal.pb.php         \
+  php/src/Google/Protobuf/descriptor.php                     \
+  php/tests/encode_decode_test.php                           \
+  php/tests/test.sh                                          \
+  php/tests/generated_class_test.php                         \
+  php/tests/array_test.php                                   \
+  php/tests/php_implementation_test.php                      \
+  php/tests/test_include.proto                               \
+  php/tests/test_include.pb.php                              \
+  php/tests/map_field_test.php                               \
+  php/tests/test_base.php                                    \
+  php/tests/test_util.php                                    \
+  php/tests/test.proto                                       \
+  php/tests/test.pb.php                                      \
+  php/tests/memory_leak_test.php                             \
+  php/README.md                                              \
+  php/ext/google/protobuf/utf8.h                             \
+  php/ext/google/protobuf/message.c                          \
+  php/ext/google/protobuf/utf8.c                             \
+  php/ext/google/protobuf/package.xml                        \
+  php/ext/google/protobuf/upb.h                              \
+  php/ext/google/protobuf/array.c                            \
+  php/ext/google/protobuf/encode_decode.c                    \
+  php/ext/google/protobuf/protobuf.h                         \
+  php/ext/google/protobuf/type_check.c                       \
+  php/ext/google/protobuf/def.c                              \
+  php/ext/google/protobuf/storage.c                          \
+  php/ext/google/protobuf/map.c                              \
+  php/ext/google/protobuf/config.m4                          \
+  php/ext/google/protobuf/upb.c                              \
+  php/ext/google/protobuf/protobuf.c                         \
+  phpunit.xml                                                \
+  composer.json
+
 python_EXTRA_DIST=                                                           \
   python/MANIFEST.in                                                         \
   python/google/__init__.py                                                  \
@@ -767,7 +818,7 @@ js_EXTRA_DIST=                              \
   js/testbinary.proto                       \
   js/testempty.proto
 
-all_EXTRA_DIST=$(csharp_EXTRA_DIST) $(java_EXTRA_DIST) $(javanano_EXTRA_DIST) $(objectivec_EXTRA_DIST) $(python_EXTRA_DIST) $(ruby_EXTRA_DIST) $(js_EXTRA_DIST)
+all_EXTRA_DIST=$(csharp_EXTRA_DIST) $(java_EXTRA_DIST) $(javanano_EXTRA_DIST) $(objectivec_EXTRA_DIST) $(php_EXTRA_DIST) $(python_EXTRA_DIST) $(ruby_EXTRA_DIST) $(js_EXTRA_DIST)
 
 EXTRA_DIST = $(@DIST_LANG@_EXTRA_DIST)   \
   autogen.sh                             \
diff --git a/configure.ac b/configure.ac
index a454bbe095..896f3471aa 100644
--- a/configure.ac
+++ b/configure.ac
@@ -31,7 +31,7 @@ AC_CONFIG_MACRO_DIR([m4])
 AC_ARG_VAR(DIST_LANG, [language to include in the distribution package (i.e., make dist)])
 case "$DIST_LANG" in
   "") DIST_LANG=all ;;
-  all | cpp | csharp | java | python | javanano | objectivec | ruby | js) ;;
+  all | cpp | csharp | java | python | javanano | objectivec | ruby | js | php) ;;
   *) AC_MSG_FAILURE([unknown language: $DIST_LANG]) ;;
 esac
 AC_SUBST(DIST_LANG)
diff --git a/post_process_dist.sh b/post_process_dist.sh
index 82736bd0de..a5f95800b8 100755
--- a/post_process_dist.sh
+++ b/post_process_dist.sh
@@ -27,7 +27,7 @@ fi
 
 set -ex
 
-LANGUAGES="cpp csharp java javanano js objectivec python ruby"
+LANGUAGES="cpp csharp java javanano js objectivec python ruby php"
 BASENAME=`basename $1 .tar.gz`
 VERSION=${BASENAME:9}
 
diff --git a/tests.sh b/tests.sh
index 71fd970606..a39448ac33 100755
--- a/tests.sh
+++ b/tests.sh
@@ -52,7 +52,7 @@ build_cpp_distcheck() {
   make dist
 
   # List all files that should be included in the distribution package.
-  git ls-files | grep "^\(java\|python\|objectivec\|csharp\|js\|ruby\|cmake\|examples\)" |\
+  git ls-files | grep "^\(java\|python\|objectivec\|csharp\|js\|ruby\|php\|cmake\|examples\)" |\
       grep -v ".gitignore" | grep -v "java/compatibility_tests" > dist.lst
   # Unzip the dist tar file.
   DIST=`ls *.tar.gz`