new file mode 100644
--- /dev/null
+++ b/library/smarty/libs/sysplugins/smarty_internal_resource_extends.php
@@ -0,0 +1,107 @@
+<?php
+/**
+ * Smarty Internal Plugin Resource Extends
+ *
+ * @package    Smarty
+ * @subpackage TemplateResources
+ * @author     Uwe Tews
+ * @author     Rodney Rehm
+ */
+
+/**
+ * Smarty Internal Plugin Resource Extends
+ * Implements the file system as resource for Smarty which {extend}s a chain of template files templates
+ *
+ * @package    Smarty
+ * @subpackage TemplateResources
+ */
+class Smarty_Internal_Resource_Extends extends Smarty_Resource {
+    /**
+     * mbstring.overload flag
+     *
+     * @var int
+     */
+    public $mbstring_overload = 0;
+
+    /**
+     * populate Source Object with meta data from Resource
+     *
+     * @param Smarty_Template_Source $source source object
+     * @param Smarty_Internal_Template $_template template object
+     *
+     * @throws SmartyException
+     */
+    public function populate(Smarty_Template_Source $source, Smarty_Internal_Template $_template = null) {
+        $uid = sha1(getcwd());
+        $sources = array();
+        $components = explode('|', $source->name);
+        $exists = true;
+        foreach ($components as $component) {
+            $s = Smarty_Resource::source(null, $source->smarty, $component);
+            if ($s->type == 'php') {
+                throw new SmartyException("Resource type {$s->type} cannot be used with the extends resource type");
+            }
+            $sources[$s->uid] = $s;
+            $uid .= realpath($s->filepath);
+            if ($_template && $_template->smarty->compile_check) {
+                $exists = $exists && $s->exists;
+            }
+        }
+        $source->components = $sources;
+        $source->filepath = $s->filepath;
+        $source->uid = sha1($uid);
+        if ($_template && $_template->smarty->compile_check) {
+            $source->timestamp = $s->timestamp;
+            $source->exists = $exists;
+        }
+        // need the template at getContent()
+        $source->template = $_template;
+    }
+
+    /**
+     * populate Source Object with timestamp and exists from Resource
+     *
+     * @param Smarty_Template_Source $source source object
+     */
+    public function populateTimestamp(Smarty_Template_Source $source) {
+        $source->exists = true;
+        foreach ($source->components as $s) {
+            $source->exists = $source->exists && $s->exists;
+        }
+        $source->timestamp = $s->timestamp;
+    }
+
+    /**
+     * Load template's source from files into current template object
+     *
+     * @param Smarty_Template_Source $source source object
+     *
+     * @return string template source
+     * @throws SmartyException if source cannot be loaded
+     */
+    public function getContent(Smarty_Template_Source $source) {
+        if (!$source->exists) {
+            throw new SmartyException("Unable to read template {$source->type} '{$source->name}'");
+        }
+
+        $_components = array_reverse($source->components);
+
+        $_content = '';
+        foreach ($_components as $_component) {
+            // read content
+            $_content .= $_component->content;
+        }
+        return $_content;
+    }
+
+    /**
+     * Determine basename for compiled filename
+     *
+     * @param Smarty_Template_Source $source source object
+     *
+     * @return string resource's basename
+     */
+    public function getBasename(Smarty_Template_Source $source) {
+        return str_replace(':', '.', basename($source->filepath));
+    }
+}