diff --git a/library/smarty/libs/sysplugins/smarty_internal_compile_private_modifier.php b/library/smarty/libs/sysplugins/smarty_internal_compile_private_modifier.php
new file mode 100644
--- /dev/null
+++ b/library/smarty/libs/sysplugins/smarty_internal_compile_private_modifier.php
@@ -0,0 +1,137 @@
+<?php
+
+/**
+ * Smarty Internal Plugin Compile Modifier
+ * Compiles code for modifier execution
+ *
+ * @package    Smarty
+ * @subpackage Compiler
+ * @author     Uwe Tews
+ */
+
+/**
+ * Smarty Internal Plugin Compile Modifier Class
+ *
+ * @package    Smarty
+ * @subpackage Compiler
+ */
+class Smarty_Internal_Compile_Private_Modifier extends Smarty_Internal_CompileBase {
+    /**
+     * Compiles code for modifier execution
+     *
+     * @param  array $args array with attributes from parser
+     * @param  object $compiler compiler object
+     * @param  array $parameter array with compilation parameter
+     *
+     * @return string compiled code
+     */
+    public function compile($args, $compiler, $parameter) {
+        // check and get attributes
+        $_attr = $this->getAttributes($compiler, $args);
+        $output = $parameter['value'];
+        // loop over list of modifiers
+        foreach ($parameter['modifierlist'] as $single_modifier) {
+            $modifier = $single_modifier[0];
+            $single_modifier[0] = $output;
+            $params = implode(',', $single_modifier);
+            // check if we know already the type of modifier
+            if (isset($compiler->known_modifier_type[$modifier])) {
+                $modifier_types = array($compiler->known_modifier_type[$modifier]);
+            } else {
+                $modifier_types = array(1, 2, 3, 4, 5, 6);
+            }
+            foreach ($modifier_types as $type) {
+                switch ($type) {
+                    case 1:
+                        // registered modifier
+                        if (isset($compiler->smarty->registered_plugins[Smarty::PLUGIN_MODIFIER][$modifier])) {
+                            $function = $compiler->smarty->registered_plugins[Smarty::PLUGIN_MODIFIER][$modifier][0];
+                            if (!is_array($function)) {
+                                $output = "{$function}({$params})";
+                            } else {
+                                if (is_object($function[0])) {
+                                    $output = '$_smarty_tpl->smarty->registered_plugins[Smarty::PLUGIN_MODIFIER][\'' . $modifier . '\'][0][0]->' . $function[1] . '(' . $params . ')';
+                                } else {
+                                    $output = $function[0] . '::' . $function[1] . '(' . $params . ')';
+                                }
+                            }
+                            $compiler->known_modifier_type[$modifier] = $type;
+                            break 2;
+                        }
+                        break;
+                    case 2:
+                        // registered modifier compiler
+                        if (isset($compiler->smarty->registered_plugins[Smarty::PLUGIN_MODIFIERCOMPILER][$modifier][0])) {
+                            $output = call_user_func($compiler->smarty->registered_plugins[Smarty::PLUGIN_MODIFIERCOMPILER][$modifier][0], $single_modifier, $compiler->smarty);
+                            $compiler->known_modifier_type[$modifier] = $type;
+                            break 2;
+                        }
+                        break;
+                    case 3:
+                        // modifiercompiler plugin
+                        if ($compiler->smarty->loadPlugin('smarty_modifiercompiler_' . $modifier)) {
+                            // check if modifier allowed
+                            if (!is_object($compiler->smarty->security_policy) || $compiler->smarty->security_policy->isTrustedModifier($modifier, $compiler)) {
+                                $plugin = 'smarty_modifiercompiler_' . $modifier;
+                                $output = $plugin($single_modifier, $compiler);
+                            }
+                            $compiler->known_modifier_type[$modifier] = $type;
+                            break 2;
+                        }
+                        break;
+                    case 4:
+                        // modifier plugin
+                        if ($function = $compiler->getPlugin($modifier, Smarty::PLUGIN_MODIFIER)) {
+                            // check if modifier allowed
+                            if (!is_object($compiler->smarty->security_policy) || $compiler->smarty->security_policy->isTrustedModifier($modifier, $compiler)) {
+                                $output = "{$function}({$params})";
+                            }
+                            $compiler->known_modifier_type[$modifier] = $type;
+                            break 2;
+                        }
+                        break;
+                    case 5:
+                        // PHP function
+                        if (is_callable($modifier)) {
+                            // check if modifier allowed
+                            if (!is_object($compiler->smarty->security_policy) || $compiler->smarty->security_policy->isTrustedPhpModifier($modifier, $compiler)) {
+                                $output = "{$modifier}({$params})";
+                            }
+                            $compiler->known_modifier_type[$modifier] = $type;
+                            break 2;
+                        }
+                        break;
+                    case 6:
+                        // default plugin handler
+                        if (isset($compiler->default_handler_plugins[Smarty::PLUGIN_MODIFIER][$modifier]) || (is_callable($compiler->smarty->default_plugin_handler_func) && $compiler->getPluginFromDefaultHandler($modifier, Smarty::PLUGIN_MODIFIER))) {
+                            $function = $compiler->default_handler_plugins[Smarty::PLUGIN_MODIFIER][$modifier][0];
+                            // check if modifier allowed
+                            if (!is_object($compiler->smarty->security_policy) || $compiler->smarty->security_policy->isTrustedModifier($modifier, $compiler)) {
+                                if (!is_array($function)) {
+                                    $output = "{$function}({$params})";
+                                } else {
+                                    if (is_object($function[0])) {
+                                        $output = '$_smarty_tpl->smarty->registered_plugins[Smarty::PLUGIN_MODIFIER][\'' . $modifier . '\'][0][0]->' . $function[1] . '(' . $params . ')';
+                                    } else {
+                                        $output = $function[0] . '::' . $function[1] . '(' . $params . ')';
+                                    }
+                                }
+                            }
+                            if (isset($compiler->template->required_plugins['nocache'][$modifier][Smarty::PLUGIN_MODIFIER]['file']) || isset($compiler->template->required_plugins['compiled'][$modifier][Smarty::PLUGIN_MODIFIER]['file'])) {
+                                // was a plugin
+                                $compiler->known_modifier_type[$modifier] = 4;
+                            } else {
+                                $compiler->known_modifier_type[$modifier] = $type;
+                            }
+                            break 2;
+                        }
+                }
+            }
+            if (!isset($compiler->known_modifier_type[$modifier])) {
+                $compiler->trigger_template_error("unknown modifier \"" . $modifier . "\"", $compiler->lex->taglineno);
+            }
+        }
+
+        return $output;
+    }
+}