zblog熊掌号页面改造结构化改造PubDate的问题

function fanly_excerpt($len=220){
if ( is_single() || is_page() ){
global $post;
if ($post->post_excerpt) {
$excerpt = $post->post_excerpt;
} else {
if(preg_match('/(.*)p>/iU',trim(strip_tags($post->post_content,"")),$result)){
$post_content = $result['1'];
} else {
$post_content_r = explode("\n",trim(strip_tags($post->post_content)));
$post_content = $post_content_r['0'];
}
$excerpt = preg_replace('#^(?:[\x00-\x7F]|[\xC0-\xFF][\x80-\xBF]+){0,0}'.'((?:[\x00-\x7F]|[\xC0-\xFF][\x80-\xBF]+){0,'.$len.'}).*#s','$1',$post_content);
}
return str_replace(array("\r\n", "\r", "\n"), "", $excerpt);
}}?>