diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..315e1ac
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "docker_library_php"]
+	path = docker_library_php
+	url = https://github.com/docker-library/php.git
diff --git a/docker_library_php b/docker_library_php
new file mode 160000
index 0000000..b4b4093
--- /dev/null
+++ b/docker_library_php
@@ -0,0 +1 @@
+Subproject commit b4b4093acd612a1b489c6442585379275e9e4df6