WordPress、投稿本文をHTMLなしで出力する

<?php
if(mb_strlen($post->post_content,'UTF-8')>100){
$content= str_replace('\n', '', mb_substr(strip_tags($post-> post_content), 0, 100,'UTF-8'));
echo $content.'…';
}else{
echo str_replace('\n', '', strip_tags($post->post_content));
}
?>