function reply_to_read($atts, $content=null) {    
        extract(shortcode_atts(array("notice" => '<p class="reply-to-read">温馨提示: 此处内容需要<a href="#respond" title="评论本文">评论本文</a>后才能查看.</p>'), $atts));    
        $email = null;    
        $user_ID = (int) wp_get_current_user()->ID;    
        if ($user_ID > 0) {    
            $email = get_userdata($user_ID)->user_email;    
            //对博主直接显示内容    
            $admin_email = "xxx@aaa.com"; //自己的Email地址
            if ($email == $admin_email) {    
                return $content;    
            }    
        } else if (isset($_COOKIE['comment_author_email_' . COOKIEHASH])) {    
            $email = str_replace('%40', '@', $_COOKIE['comment_author_email_' . COOKIEHASH]);    
        } else {    
            return $notice;    
        }    
        if (empty($email)) {    
            return $notice;    
        }    
        global $wpdb;    
        $post_id = get_the_ID();    
        $query = "SELECT `comment_ID` FROM {$wpdb->comments} WHERE `comment_post_ID`={$post_id} and `comment_approved`='1' and `comment_author_email`='{$email}' LIMIT 1";    
        if ($wpdb->get_results($query)) {    
            return do_shortcode($content);    
        } else {    
            return $notice;    
        }    
    }    
    add_shortcode('reply', 'reply_to_read');

function reply_tags($mce_settings) {
?>
<script type="text/javascript">
QTags.addButton( '回复可见', '回复可见', '[reply]', '[/reply]' );
function shortcode() {
}
</script>
<?php
}
add_action('after_wp_tiny_mce', 'reply_tags');

//两种方法都可以
[reply]回复可见的内容[/reply]
[reply notice="自定义的提示信息"]回复可见的内容[/reply]

function e_secret($atts, $content=null){
    extract(shortcode_atts(array('key'=>null), $atts));
    if(isset($_POST['e_secret_key']) && $_POST['e_secret_key']==$key){
        return '
<div class="e-secret">'.$content.'</div>
';
    }
    else{
        return '
<form action="'.get_permalink().'" method="post" name="e-secret" ><p>输入密码查看内容：</p><p><label for="pwbox-26">密码：<input type="password" name="e_secret_key"  id="pwbox-26" size="20"></label><input type="submit"  value="确定"></p>
<div class="euc-clear"></div>
</form>
';
    }
}
add_shortcode('secret','e_secret');

function mmkj_tags($mce_settings) {
?>
<script type="text/javascript">
QTags.addButton( '密码可见', '密码可见', '[secret key="1235"]', '[/secret]' );//密码可修改
function shortcode() {
}
</script>
<?php
}
add_action('after_wp_tiny_mce', 'mmkj_tags');

[secret key="密码"]加密内容[/secret]