previous_image_link()

Kalon,

Hi. Unfortunately, these functions are not pluggable and don’t return anything on failure. This will most likely be addressed in a future release. Until then, the best advice that I can offer you is to write your own functions (or use mine below) that do exactly as you want.

Add To: functions.php

function mf_previous_image_link( $text ) {
    $i = mf_adjacent_image_link( true );
	if ( $i )
		print $text . $i;
}

function mf_next_image_link( $text ) {
    $i = mf_adjacent_image_link( false );
	if ( $i )
		print $text . $i;
}

function mf_adjacent_image_link($prev = true) {
    global $post;
    $post = get_post($post);
    $attachments = array_values(get_children("post_parent=$post->post_parent&post_type=attachment&post_mime_type=image&orderby=\"menu_order ASC, ID ASC\""));

    foreach ( $attachments as $k => $attachment )
        if ( $attachment->ID == $post->ID )
            break;

    $k = $prev ? $k - 1 : $k + 1;

    if ( isset($attachments[$k]) )
        return wp_get_attachment_link($attachments[$k]->ID, 'thumbnail', true);
	else
		return false;
}

Add To: image.php

<small><?php mf_previous_image_link( 'Previous Image' ) ?></small>
<small><?php mf_next_image_link( 'Next Image' ) ?></small>

Please let me know how this works!

Thank you for your time mfields, your code works perfectly.

My blog is currently on my localhost, while I develop it and find a host that isn’t complete pants, but you can see the navigation part in the below screenshot:

https://img177.imageshack.us/img177/4522/screen2xc1.gif

Again, thanks for your help,
Kalon.

Kalon,
Glad it worked for you!

Hi,

What about a custom image? For example arrows for previous and next.

Thanks in advance!

Hi,
I’ve been quit lucky after I read this thread, because such kind of function I am looking for. But after copy and past of that code sniplets I get this error message:

Warning: array_values() [function.array-values]: The argument should be an array in /var/kunden/webs/leinert/wordpress/wp-includes/functions.php on line 1767

Warning: Invalid argument supplied for foreach() in /var/kunden/webs/leinert/wordpress/wp-includes/functions.php on line 1769

What has been changed in get_children?

Please help! I do not want to wait for 2.6!

get_children needs its arguments as an array now. This should be good for 2.6:

function mf_previous_image_link( $text ) {
    $i = mf_adjacent_image_link( true );
	if ( $i )
		print $text . $i;
}

function mf_next_image_link( $text ) {
    $i = mf_adjacent_image_link( false );
	if ( $i )
		print $text . $i;
}

function mf_adjacent_image_link($prev = true) {
    global $post;
    $post = get_post($post);
    $attachments = array_values(get_children(
Array('post_parent' => $post->post_parent,
      'post_type' => 'attachment',
      'post_mime_type' => 'image',
      'orderby' => 'menu_order ASC, ID ASC')));

    foreach ( $attachments as $k => $attachment )
        if ( $attachment->ID == $post->ID )
            break;

    $k = $prev ? $k - 1 : $k + 1;

    if ( isset($attachments[$k]) )
        return wp_get_attachment_link($attachments[$k]->ID, 'thumbnail', true);
	else
		return false;

Or, if you’d prefer, the author has changed it to a plugin:

https://mfields.org/wordpress-plugins/text-based-image-links/

??

Some may be interested in this variant:

For image links I wanted something functional equivalent to:
previous_post_link('<li>%link</li>');

So thanks to this thread I came up with this:

In functions.php:

function ps_previous_image_link( $f ) {
    $i = ps_adjacent_image_link( true );
	if ( $i ) {
		echo str_replace("%link", $i, $f);
	}
}

function ps_next_image_link( $f ) {
    $i = ps_adjacent_image_link( false );
	if ( $i ) {
		echo str_replace("%link", $i, $f);
	}
}

function ps_adjacent_image_link($prev = true) {
    global $post;
    $post = get_post($post);
    $attachments = array_values(get_children(Array('post_parent' => $post->post_parent,
	      'post_type' => 'attachment',
	      'post_mime_type' => 'image',
	      'orderby' => 'menu_order ASC, ID ASC')));

    foreach ( $attachments as $k => $attachment ) {
        if ( $attachment->ID == $post->ID ) {
            break;
		}
	}

    $k = $prev ? $k - 1 : $k + 1;

    if ( isset($attachments[$k]) ) {
        return wp_get_attachment_link($attachments[$k]->ID, 'thumbnail', true);
	}
	else {
		return false;
	}
}

In image.php:

<ol>
<?php ps_previous_image_link( '<li>%link</li>' ) ?>
<?php ps_next_image_link( '<li>%link</li>' ) ?>
</ol>

Thanks guys.

@pstagg

I only think that you have confused previous & next ??

@pstagg, can you help me, I would like to add #photo to the URL the generated thumbnail links to.

Or anybody else of course..

I’m using the code above from pstagg. It’s generating thumbnails to link to the next and prev images.

I just want to add #photo to the generated url. Should be simple, but I can’t find it.

no one?