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+Output Filters {#plugins.outputfilters}
+==============
+
+Output filter plugins operate on a template\'s output, after the
+template is loaded and executed, but before the output is displayed.
+
+string
+
+smarty\_outputfilter\_
+
+name
+
+string
+
+\$template\_output
+
+object
+
+\$template
+
+The first parameter to the output filter function is the template output
+that needs to be processed, and the second parameter is the instance of
+Smarty invoking the plugin. The plugin is supposed to do the processing
+and return the results.
+
+
+    <?php
+    /*
+     * Smarty plugin
+     * -------------------------------------------------------------
+     * File:     outputfilter.protect_email.php
+     * Type:     outputfilter
+     * Name:     protect_email
+     * Purpose:  Converts @ sign in email addresses to %40 as
+     *           a simple protection against spambots
+     * -------------------------------------------------------------
+     */
+     function smarty_outputfilter_protect_email($output, Smarty_Internal_Template $template)
+     {
+         return preg_replace('!(\S+)@([a-zA-Z0-9\.\-]+\.([a-zA-Z]{2,3}|[0-9]{1,3}))!',
+                             '$1%40$2', $output);
+     }
+    ?>
+
+         
+
+See also [`registerFilter()`](#api.register.filter),
+[`unregisterFilter()`](#api.unregister.filter).