pixelshifter

This plugin is just as simple as it sounds. If you already use the fabulous plugin <a href="https://wordpress.org/extend/plugins/nextgen-gallery/" rel="ugc">NextGEN Gallery</a> than the titleimage plugin gives you the ability to display the first image or a random image from a selected NexGEN Gallery. This selected image will be displayed with the php function call showTitleimage(), which can be used inside your templates. The best place would be inside the index.php file after the get_header(); call.
The following parameters are accessible on the Tools->Titleimage administration page:
<ul>
<li>State – Switches the display of the titleimage on or off.</li>
<li>Gallery – Selects the NGG Ressource-Gallery</li>
<li>Image selection – Selects the image that should be displayed from the given gallery. It is possible to select the first image, a random image or a specified image.</li>
<li>Imagesize – Defines the maximum Imagewidth and -height.</li>
<li>Image Link – An URL with which the image will be linked.</li>
<li>Image Link Attributes – Additional attributes for the image link to apply CSS classes for Javascript Lightbox Effects etc.</li>
<li>Image Subtitle – Enables the image subtitle in different options (Gallery description, Image description, Individual text, No subtitlte).</li>
<li>Subtitle Link – An URL with which the subtitle will be linked.</li>
<li>Style – Defines wether the default CSS or an individual CSS File should be used.</li>
</ul>
Localizations:
<ul>
<li>German</li>
<li>English</li>
</ul>
<h4>Version 0.7.2</h4>
<ul>
<li>No longer under development.</li>
</ul>

Titleimage

NOTICE: This plugin is no longer under development.

Scott Reilly

Display an image for each category associated with a post.
Notes:
This plugin provides the templates tag <code>c2c_the_category_image()</code> which basically reproduces and extends the functionality of WordPress’s core function <code>the_category()</code> to add the ability to display a category image instead of the category name in the link to the category archive. With its $image_extensions argument defaulted to <code>""</code>, the plugin could be a drop-in replacement for <code>the_category()</code>. As is done in <code>the_category()</code>, the image or text for each category is also a link back to that category’s archive.
Related info about the function:
<ul>
<li>If $image_extensions is defined, but no image is found for the category, then nothing is displayed for that category.</li>
<li>$image_extensions can be defined as a space separated list of image extensions. Files will be checked with the image extensions in the order those extensions were provided; default is ‘png gif jpg’.</li>
<li>The number of category links/images displayed can be limited via the $limit argument</li>
<li>Category image tags are defined with class=”catimage” for stylesheet manipulation.</li>
<li>The result can be filtered via the filter named “c2c_the_category_image”.</li>
<li>
Must be run inside “the loop”.
c2c_get_category_image_list() is another provided function, which is identical to <code>c2c_the_category_image()</code> except that it doesn’t echo the result.
</li>
</ul>
Links: <a href="http://coffee2code.com/wp-plugins/category-images/" rel="nofollow ugc">Plugin Homepage</a> | <a href="https://wordpress.org/extend/plugins/category-images/" rel="ugc">Plugin Directory Page</a> | <a href="http://coffee2code.com" rel="nofollow ugc">Author Homepage</a>
<h3>Template Tags</h3>
The plugin provides one optional template tag for use in your theme templates.
<h4>Functions</h4>
<ul>
<li><code><?php function c2c_the_category_image( $seperator='', $parents='', $image_extensions='png gif jpg', $image_dir='/wp-content/images/', $use_name_if_no_image=false, $start_from='begin', $limit=999 ) ?></code></li>
</ul>
This displays the image associated with a post’s categories.
<h4>Arguments</h4>
<ul>
<li>
<code>$separator</code> 
Optional argument. The text and/or HTML to appear between each of a post’s category images.
</li>
<li>
<code>$parents</code> 
Optional argument. Allows you to specify if you want ancestor categories of a post’s category to be imaged and linked as well. Valid options are ‘multiple’, ‘single’, and ”. Default is ”.
</li>
<li>
<code>$image_extensions</code> 
Optional argument. A space-separated list of image extensions (case insensitive). If defined as ” then no image is retrieved and the category name is displayed instead (a la <code>the_category()</code>). Default is ‘png gif jpg’.
</li>
<li>
<code>$image_dir</code> 
Optional argument. The directory in which the category image(s) reside. The value should be a location relative to the main URL of your blog. Default is ‘/wp-content/images/’
</li>
<li>
<code>$use_name_if_no_image</code> 
Optional argument. Boolean value (true or false) indicating if the name of the category should be displayed for each category that does not have an associated image. Default is false.
</li>
<li>
<code>$start_from</code> 
Optional argument. How to traverse the list of post’s categories; either ‘begin’ or ‘end’. Default is ‘begin’
</li>
<li>
<code>$limit</code> 
Optional argument. The maximum number of category images to be displayed. Default is 999 (basically, no limit)
</li>
<li>
<code>$post_id</code> 
Optional argument. The Post ID. If false, then use the current post (i.e. while in the loop). Default is false.
</li>
</ul>
<h3>Examples</h3>
<ul>
<li>
You can opt to treat only certain categories as having a graphical representation by defining an image for them but not creating images for the non-graphically represented categories (as in you can have a subset of categories that dictate what image to be displayed for the post).
</li>
<li>
You can take advantage of the $image_extension and/or $image_dir arguments to display different category icons under different contexts, i.e. if showing a $single post, choose to use a ‘png’ image, otherwise use ‘gif’; or locate your images in different directories ‘/wp-content/images/cat-images/small/’ and ‘/wp-content/images/cat-images/large/’ and decide based on context where to get the image(s) from:
// In showing the post singularly, then use a larger image, else use a small image 
 if ( is_single() ) { 
 c2c_the_category_image(”, ”, ‘gif’, ‘/wp-content/images/cat-images/large/’); 
 } else { 
 c2c_the_category_image(”, ”, ‘gif’, ‘/wp-content/images/cat-images/small/’); 
 }
</li>
<li>
Show all images in a comma-separated line:
</li>
<li>
Show all images in an unordered list:
</li>
<li>
Assuming one category per post, just show the category image without further HTML markup:
< ?php c2c_the_category_image(' '); // note the space in the argument, necessary to turn off default 
<ul> markups ?>
<h3>Filters</h3>
The plugin exposes two filters and one action for hooking. Typically, customizations utilizing these hooks would be put into your active theme’s functions.php file, or used by another plugin.
</li>
</ul>
<h4>c2c_get_category_image (filter)</h4>
The ‘c2c_get_category_image’ hook allows you to use an alternative approach to safely invoke <code>c2c_get_category_image()</code> in such a way that if the plugin were deactivated or deleted, then your calls to the function won’t cause errors in your site.
Arguments:
<ul>
<li>same as for <code>c2c_get_category_image()</code></li>
</ul>
Example:
Instead of:
<pre><code> <?php $cat_images = c2c_get_category_image( $cat ); ?>
</code></pre>
Do:
<pre><code> <?php $cat_images = apply_filters( 'c2c_get_category_image', $cat ); ?>
</code></pre>
<h4>c2c_get_the_category_image_list (filter)</h4>
The ‘c2c_get_the_category_image_list’ hook allows you to use an alternative approach to safely invoke <code>c2c_get_the_category_image_list()</code> in such a way that if the plugin were deactivated or deleted, then your calls to the function won’t cause errors in your site.
Arguments:
<ul>
<li>same as for <code>c2c_get_the_category_image_list()</code></li>
</ul>
Example:
Instead of:
<pre><code> <?php $cat_list = c2c_get_the_category_image_list(); ?>
</code></pre>
Do:
<pre><code> <?php $cat_list = apply_filters( 'c2c_get_the_category_image_list', '' ); ?>
</code></pre>
<h4>c2c_the_category_image (action)</h4>
The ‘c2c_the_category_image’ hook allows you to use an alternative approach to safely invoke <code>c2c_the_category_image()</code> in such a way that if the plugin were deactivated or deleted, then your calls to the function won’t cause errors in your site.
Arguments:
<ul>
<li>same as for <code>c2c_the_category_image()</code></li>
</ul>
Example:
Instead of:
<pre><code> <?php c2c_the_category_image(); ?>
</code></pre>
Do:
<pre><code> <?php do_action( 'c2c_the_category_image' ); ?>
</code></pre>

Category Image(s)

Display an image for each category associated with a post.

Titleimage vs Category Image(s)