Wordpress自定义函数控制文章标题长度

function TruncateTitle($max_length) {
$title_str = get_the_title();
if (mb_strlen($title_str,'utf-8') > $max_length ) {
$title_str = mb_substr($title_str,0,$max_length,'utf-8').'...';
}
return $title_str;
}

<a href=”<?php the_permalink() ?>” target=”_blank”><?php echo TruncateTitle(14); ?></a>