適当

gistfile1.aw

--- function.php
<?php

function exists_custom_field ($field) {
    return post_custom($field) != "" ? true : false;
}

?>
---
<?php if (exists_custom_field('imagefield_1')) ?>
<h4>Photo</h4>
<div class="imagefield">
<?php foreach (range(1, 4) as $num) {
    if (exists_custom_field("imagefield_$num")) {
?>
<a href=<?php echo post_custom("imagefield_$num")?> rel="lightbox"></a>
<?php }
} ?>
</div>
<?php endif ?>