WordPress添加登录可见和评论可见教程-西西下载网

先加入funtion代码

// 未登录提示卡片  即登录可见
add_shortcode('hide', 'loginvisible');
function loginvisible($atts, $content = null)
{
    if (is_user_logged_in() && !is_null($content) && !is_feed()) {
        return $content;
    }
    $out = '
            <div class="post-hidden-tips">
            <div class="hidden-blur-poster" style="background-image: url(https://lz.sinaimg.cn/mw690/73f6551dly1hd901lbkzwj207m03k0dz.jpg);"></div>
            <div class="hidden-tips-text">此处内容需要<a style="color: #000; font-weight: 600;" href="/wp-login.php" title="注册登录">&nbsp注册登录</a>&nbsp后才能查看隐藏内容</div>
            </div>';

    return $out;
}

// 回复可见
add_shortcode('reply', 'reply_to_read');
function reply_to_read($atts, $content = null)
{
    $out = '
            <div class="post-hidden-tips">
            <div class="hidden-blur-poster" style="background-image: url(https://lz.sinaimg.cn/mw690/73f6551dly1hd901lbkzwj207m03k0dz.jpg);"></div>
            <div class="hidden-tips-text">此处内容需要<a style="color: #000; font-weight: 600;" href="' . get_permalink() . '#respond" title="评论本文">&nbsp评论本文</a>&nbsp后刷新本页才能查看.</div>
            </div>';
    extract(shortcode_atts(array("notice" => $out), $atts));
    $email = null;
    $user_ID = (int)wp_get_current_user()->ID;
    if ($user_ID > 0) {
        $email = get_userdata($user_ID)->user_email; //如果用户已登录,从登录信息中获取email
    } else if (isset($_COOKIE['comment_author_email_' . COOKIEHASH])) {
        $email = str_replace('%40', '@', $_COOKIE['comment_author_email_' . COOKIEHASH]); //如果用户未登录但电脑上有本站的Cookie信息，从Cookie里读取email
    } else {
        return $notice; //无法获取email，直接返回提示信息
    }
    if (empty($email)) {
        return $notice;
    }
    // 已做缓存 https://m.wpjam.com/article/wordpress-transients-api/
    // 6个小时查询一次
    global $wpdb;
    $post_id = get_the_ID(); //文章的ID
    $reply_to_read = get_transient('reply_to_read_' . $email . '_' . $post_id); // 缓存每个人的查询
    $query = "SELECT `comment_ID` FROM {$wpdb->comments} WHERE `comment_post_ID`={$post_id} and `comment_approved`='1' and `comment_author_email`='{$email}' LIMIT 1";
    if ($reply_to_read) {
        return $content;
    } else {
        if ($wpdb->get_results($query)) {
            set_transient('$reply_to_read'. $email . '_' . $post_id, true, 60 * 60 * 6);
            return $content; //查询到对应的已经审核通过的评论则返回内容
        } else {
            return $notice; //否则返回提示信息
        }

    }

}

其次引入CSS美化代码

/* 回复模块 */
.post-hidden-tips {
    position: relative;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    text-align: center;
    font-size: 14px;
    padding: 4rem;
    margin: 2rem 0;
    border-radius: var(--radius-wrap);
}
.hidden-blur-poster {
    position: absolute;
    right: 0;
    bottom: 0;
    top: 0;
    left: 0;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    border-radius: inherit;
    opacity: .4;
}
.post-hidden-tips .hidden-tips-text {
    position: relative;
    -webkit-box-shadow: inset 0 -2px 0 var(--Maincolor);
    box-shadow: inset 0 -2px 0 var(--Maincolor);;
}
.post-hidden-tips .hidden-tips-text .hidden-tips-arrow {
    position: absolute;
    width: 20px;
    height: 20px;
    border-radius: 100%;
    top: 50%;
    right: 0;
    background: var(--Maincolor);
    -webkit-transform: translate(150%,-50%);
    -ms-transform: translate(150%,-50%);
    transform: translate(150%,-50%);
}

最后是插入代码，效果如下图