diff --git a/Smarty.class.php b/Smarty.class.php
index a6c1c488..98ba5f29 100644
--- a/Smarty.class.php
+++ b/Smarty.class.php
@@ -450,7 +450,7 @@ class Smarty
 	 *
 	 * @access private
 	 */
-    var $_version              = '2.3.1';
+    var $_version              = '2.4.0';
 
 	/**
 	 * current template inclusion depth
diff --git a/docs/html.dsl b/docs/html.dsl
index 82a5e5f8..e312da30 100644
--- a/docs/html.dsl
+++ b/docs/html.dsl
@@ -8,7 +8,7 @@
 <style-specification id="docbook-smarty-html" use="docbook">
 <style-specification-body>
 
-(define %html-ext% ".php")
+(define %html-ext% ".html")
 
 &html-common.dsl;
 &common.dsl;
diff --git a/docs/php.dsl b/docs/php.dsl
new file mode 100644
index 00000000..82a5e5f8
--- /dev/null
+++ b/docs/php.dsl
@@ -0,0 +1,21 @@
+<!DOCTYPE style-sheet PUBLIC "-//James Clark//DTD DSSSL Style Sheet//EN" [
+<!ENTITY docbook.dsl SYSTEM "/usr/share/sgml/docbook/html/docbook.dsl" CDATA DSSSL>
+<!ENTITY html-common.dsl SYSTEM "html-common.dsl">
+<!ENTITY common.dsl SYSTEM "common.dsl">
+]>
+
+<style-sheet>
+<style-specification id="docbook-smarty-html" use="docbook">
+<style-specification-body>
+
+(define %html-ext% ".php")
+
+&html-common.dsl;
+&common.dsl;
+
+</style-specification-body>
+</style-specification>
+
+<external-specification id="docbook" document="docbook.dsl">
+
+</style-sheet>
diff --git a/libs/Smarty.class.php b/libs/Smarty.class.php
index a6c1c488..98ba5f29 100644
--- a/libs/Smarty.class.php
+++ b/libs/Smarty.class.php
@@ -450,7 +450,7 @@ class Smarty
 	 *
 	 * @access private
 	 */
-    var $_version              = '2.3.1';
+    var $_version              = '2.4.0';
 
 	/**
 	 * current template inclusion depth