Emlog文章隐藏内容登陆后可见

<?php //登录后可见
function slyc($content){
if (preg_match_all('/<yc\>([\s\S]*?)<\/yc\>/i', $content, $hide_words)){
if(ISLOGIN ){$content = str_replace($hide_words[0], $hide_words[1], $content);}else{
$hide_notice = '<div style="text-align:center;border:1px dashed #FF9A9A;padding:8px;margin:10px auto;color:#FF6666;">您必须先<a href="'.BLOG_URL.'admin">登录</a>才能查看隐藏内容</div>';
$content = str_replace($hide_words[0], $hide_notice, $content);
}}return $content;}?>