PHP + Wordpress : foreach repeat html structure after every nth - php

Question

I am trying to achieve result with below structure in foreach loop where after every two images it will repeat entire structure.
I have some basic knowledge for something I can use eg. counter++; and than %2 but don't know syntax and how to use it for my code.
<?php
function dt_attached($postid=0, $size='thumbnail', $attributes='', $linksize='full', $count=-1) {
if ($postid<1) $postid = get_the_ID();
if ($images = get_children(array(
'post_parent' => $postid,
'post_type' => 'attachment',
'numberposts' => $count,
'post_mime_type' => 'image',)))
foreach($images as $image) {
$attachment=wp_get_attachment_image_src($image->ID, 'thumbnail');
$small_image = wp_get_attachment_image_src($image->ID, 'midium');
$big_image = wp_get_attachment_image_src($image->ID, 'full');
?>
<div class="mainrow">
<div class="block">
<a href='<?php echo $big_image[0]; ?>' class='cloud-zoom-gallery' title='Thumbnail 1' rel="useZoom: 'zoom1', smallImage: '<?php echo $small_image[0]; ?>' ">
<img src="<?php echo $attachment[0]; ?>" <?php echo $attributes; ?> />
</a>
</div>
<!--[I want to get two images in mainrow]-->
<div class="block">
<a href='<?php echo $big_image[0]; ?>' class='cloud-zoom-gallery' title='Thumbnail 1' rel="useZoom: 'zoom1', smallImage: '<?php echo $small_image[0]; ?>' ">
<img src="<?php echo $attachment[0]; ?>" <?php echo $attributes; ?> />
</a>
</div>
</div>
<?php //the_attachment_link($image->ID, false, true, false); ?>
<?php }
}
?>
So what I want is if there is more than two images it will repeat entire html structure. Thanks a lot for your help

Answer 1

What I gathered from your comments is that you want to display two images per row, and if there's one extra image, to display a placeholder next to it in the final row.
All you need is a count of how many images there are, and whether it's an even or odd number. Then once you know you're at the last image (using an incrementing counter), you add the placeholder:
What your code doesn't do is place two images in one row. For that we need to take the modulo (%) of the counter as well.
<?php
$counter = 0;
$imgCount = count($images);
foreach ($images as $image) {
$attachment = wp_get_attachment_image_src($image->ID, 'thumbnail');
$small_image = wp_get_attachment_image_src($image->ID, 'midium');
$big_image = wp_get_attachment_image_src($image->ID, 'full');
if ($counter % 2 == 0): ?>
<div class="mainrow">
<?php endif; ?>
<div class="block">
<a href='<?php echo $big_image[0]; ?>' class='cloud-zoom-gallery' title='Thumbnail 1' rel="useZoom: 'zoom1', smallImage: '<?php echo $small_image[0]; ?>' ">
<img src="<?php echo $attachment[0]; ?>" <?php echo $attributes; ?> />
</a>
</div>
<?php if ($counter++ % 2 == 1): ?>
</div>
<?php endif; ?>
<?php //the_attachment_link($image->ID, false, true, false); ?>
<?php
}
// Since (if there are an odd number of images) the loop may not close the <div>,
// we have to make sure it does.
if ($counter % 2 == 0) {
?>
<!-- placeholder goes here -->
</div>
<?php
}