diff --git a/library/smarty/libs/sysplugins/smarty_internal_write_file.php b/library/smarty/libs/sysplugins/smarty_internal_write_file.php
new file mode 100644
--- /dev/null
+++ b/library/smarty/libs/sysplugins/smarty_internal_write_file.php
@@ -0,0 +1,86 @@
+<?php
+/**
+ * Smarty write file plugin
+ *
+ * @package    Smarty
+ * @subpackage PluginsInternal
+ * @author     Monte Ohrt
+ */
+
+/**
+ * Smarty Internal Write File Class
+ *
+ * @package    Smarty
+ * @subpackage PluginsInternal
+ */
+class Smarty_Internal_Write_File {
+    /**
+     * Writes file in a safe way to disk
+     *
+     * @param  string $_filepath complete filepath
+     * @param  string $_contents file content
+     * @param  Smarty $smarty smarty instance
+     *
+     * @throws SmartyException
+     * @return boolean true
+     */
+    public function writeFile($_filepath, $_contents, Smarty $smarty) {
+        $_error_reporting = error_reporting();
+        error_reporting($_error_reporting & ~E_NOTICE & ~E_WARNING);
+        if ($smarty->_file_perms !== null) {
+            $old_umask = umask(0);
+        }
+
+        $_dirpath = dirname($_filepath);
+        // if subdirs, create dir structure
+        if ($_dirpath !== '.' && !file_exists($_dirpath)) {
+            mkdir($_dirpath, $smarty->_dir_perms === null ? 0777 : $smarty->_dir_perms, true);
+        }
+
+        // write to tmp file, then move to overt file lock race condition
+        $_tmp_file = $_dirpath . DS . str_replace(array('.', ','), '_', uniqid('wrt', true));
+        if (!file_put_contents($_tmp_file, $_contents)) {
+            error_reporting($_error_reporting);
+            throw new SmartyException("unable to write file {$_tmp_file}");
+        }
+
+        /*
+         * Windows' rename() fails if the destination exists,
+         * Linux' rename() properly handles the overwrite.
+         * Simply unlink()ing a file might cause other processes
+         * currently reading that file to fail, but linux' rename()
+         * seems to be smart enough to handle that for us.
+         */
+        if (Smarty::$_IS_WINDOWS) {
+            // remove original file
+            if (is_file($_filepath)) {
+                @unlink($_filepath);
+            }
+            // rename tmp file
+            $success = @rename($_tmp_file, $_filepath);
+        } else {
+            // rename tmp file
+            $success = @rename($_tmp_file, $_filepath);
+            if (!$success) {
+                // remove original file
+                if (is_file($_filepath)) {
+                    @unlink($_filepath);
+                }
+                // rename tmp file
+                $success = @rename($_tmp_file, $_filepath);
+            }
+        }
+        if (!$success) {
+            error_reporting($_error_reporting);
+            throw new SmartyException("unable to write file {$_filepath}");
+        }
+        if ($smarty->_file_perms !== null) {
+            // set file permissions
+            chmod($_filepath, $smarty->_file_perms);
+            umask($old_umask);
+        }
+        error_reporting($_error_reporting);
+
+        return true;
+    }
+}