diff --git a/configure.ac b/configure.ac
index cd58b7f..6b7e09a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -396,12 +396,23 @@ AC_SEARCH_LIBS([dlopen], [dl], AC_DEFINE(HAVE_LIBDL), AC_MSG_NOTICE([libdl not p
 
 AC_ARG_WITH([php-config], [AS_HELP_STRING([--with-php-config], [Path to php-config tool])], [ PHPCONFIG="$withval" ],[ AC_PATH_TOOL(PHPCONFIG, php-config, , $PATH) ])
 
-if test -z "${PHPCONFIG}"; then
-	AC_MSG_NOTICE([Program php-config not found. Use --with-php-config=path to specify absolute path to the php-config tool.])
-else
-	AC_DEFINE(HAVE_PHP)
-	EXTENSIONS="$EXTENSIONS php"
-fi
+case "$host" in
+        *-mingw32)
+		AC_MSG_NOTICE([PHP disabled on windows platforms.])
+		;;
+
+	*-apple-*)
+		AC_MSG_NOTICE([PHP disabled on apple platforms.])
+		;;
+
+	*)
+		if test -z "${PHPCONFIG}"; then
+			AC_MSG_NOTICE([Program php-config not found. Use --with-php-config=path to specify absolute path to the php-config tool.])
+		else
+			AC_DEFINE(HAVE_PHP)
+			EXTENSIONS="$EXTENSIONS php"
+		fi
+esac
 
 AC_SUBST(PHPCONFIG)
 
--
libgit2 0.21.2