<?php

$name= get_post_meta($post->ID, ‘name’, true); // 检查这个字段是否有值

if (empty ( $name)) { //如果值为空，输出 $name = ”; }

else { //否则下列内容

echo ‘<li> <a class=”example-image-link” href=”‘. $name.‘” data-lightbox=”example-set” target=”_blank” rel=”noopener noreferrer”> <img class=”example-image” src=”‘. $name.‘” ” /></a> </li>’;

} ?>