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diff --git a/smarty/libs/plugins/modifiercompiler.upper.php b/smarty/libs/plugins/modifiercompiler.upper.php
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+++ b/smarty/libs/plugins/modifiercompiler.upper.php
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+<?php
+/**
+ * Smarty plugin
+ *
+ * @package    Smarty
+ * @subpackage PluginsModifierCompiler
+ */
+
+/**
+ * Smarty upper modifier plugin
+ * Type:     modifier<br>
+ * Name:     lower<br>
+ * Purpose:  convert string to uppercase
+ *
+ * @link   http://smarty.php.net/manual/en/language.modifier.upper.php lower (Smarty online manual)
+ * @author Uwe Tews
+ *
+ * @param array $params parameters
+ *
+ * @return string with compiled code
+ */
+function smarty_modifiercompiler_upper($params)
+{
+    if (Smarty::$_MBSTRING) {
+        return 'mb_strtoupper(' . $params[ 0 ] . ', \'' . addslashes(Smarty::$_CHARSET) . '\')';
+    }
+    // no MBString fallback
+    return 'strtoupper(' . $params[ 0 ] . ')';
+}