<?php
/*
 * Smarty plugin
 * -------------------------------------------------------------
 * File:     outputfilter.protect_email.php
 * Type:     outputfilter
 * Name:     protect_email
 * Purpose:  将邮件地址的@转换成%40，以防止垃圾邮件爬虫的收集。
 * -------------------------------------------------------------
 */
 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);
 }
?>