How to output comma-separated array?

OK, I have updated my code based on both of your help… and am one step closer I do believe!

<div class="thumbnails"><h2>Additional Colors</h2><ul class="additional_colors"><?php

	$attachments = get_posts( array(
		'post_type' 	=> 'attachment',
		'numberposts' 	=> -1,
		'post_status' 	=> null,
		'post_parent' 	=> $post->ID,
		'post__not_in'	=> array( get_post_thumbnail_id() ),
		'post_mime_type'=> 'image',
		'orderby'		=> 'menu_order',
		'order'			=> 'ASC'
	) );
	if ($attachments) {

		$loop = 0;
		$columns = apply_filters( 'product_thumbnails_columns', 3 );

		foreach ( $attachments as $key => $attachment ) {

			if ( get_post_meta( $attachment->ID, '_exclude_image', true ) == 1 )
				continue;

			$classes = array( 'zoom' );

			if ( $loop == 0 || $loop % $columns == 0 )
				$classes[] = 'first';

			if ( ( $loop + 1 ) % $columns == 0 )
				$classes[] = 'last';

		    $additional_colors = get_post_meta($post->ID, 'additional_colors', true);
	if($additional_colors != '') {
		$additional_colors = explode(',', $additional_colors);
		if(is_array($additional_colors)){
			foreach ($additional_colors as $additional_color) {
				printf( '<li><a href="%s" title="%s" rel="thumbnails" class="%s">%s</a> %s</li>', wp_get_attachment_url( $attachment->ID ), $additional_color, implode(' ', $classes), wp_get_attachment_image( $attachment->ID, apply_filters( 'single_product_small_thumbnail_size', 'shop_thumbnail' ) ), $additional_color );
			}
		}
	}		

			$loop++;

		}

	}
?>
</ul>
</div>

Below is a link to the current output!

http://dalemoore.net/junk/progress-heckyea.png

It is outputting the text where I want, FINALLY!, but it is outputting the thumbnails and the text three times… hmmm…

Hi keesiemeijer,

The custom field is attached to the page, not to the attachments. I wasn’t aware you could use custom fields with attachments.

Ah… I think I see what you mean.

I followed the steps in the WP Beginner tutorial, and changed the first field to my Additional Colors and left the photographer url one alone for now, and set it up as a plugin as they recommended and activated it. It does create a new custom field in the Media, but I’m now thinking this isn’t how I need it to work…

Is there not a way to do it attached to the page instead of the attachment, but still inject it into that attachment code? The code I have now seems to do it, it just does it x times, depending on the number of attachments/additional colors. Attaching it to the postmeta of the attachment isn’t going to work. I’m needing the two to “technically” be separate, but output on the frontend together. The reasoning is that I’m uploading a CSV using a plugin to handle this, and there’s an additional_colors column in it. The plugin requires all meta fields to be attached to the page.

bcworkz –

You are the (wo)man! That totally worked. Thanks to you and keesiemeijer for your assistance with this.

I understand what you mean about how they can get out of sync. I will work on improving it as time allows, but since it will be handled through the spreadsheet it shouldn’t be too difficult to keep in order.

I’m comparing what I had with what you just said now to try to decipher the differences/what is happening/what went wrong.

I just started a basic intro PHP book last night, http://www.sitepoint.com/books/phpmysql5/. It seems like a good introduction. If you have other recommendations, for more design-inclined people, I’d love to know about them. 🙂 I’ve gotten by for a while just trial and error and Google, but ready to buckle down and learn proper. Thanks again!