Hi Lester, I have put the code inside the loop.
<?php if (have_posts()): ?>
<?php while ( have_posts() ) : the_post(); ?>
<?php
$gallery = get_children( 'posts_per_page=-1post_type=attachment&post_mime_type=image&post_parent=' . $post->ID );
$attr = array(
'class' => "attachment-$size wp-post-image",
);
foreach( $gallery as $image ) {
echo '<a href="' . wp_get_attachment_url($image->ID) . '" rel="gallery-' . get_the_ID() . '">';
echo wp_get_attachment_image($image->ID, 'thumbnail', false, $attr);
echo '</a>';
}
?>
<?php endwhile; ?>
<?php endif; ?>
