3: The Loop in Java

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3: The Loop
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< php endwhile; > </ul> </div><div class="column left"> <h2>Latest from <span>Oranges</span></h2> <ul> <! Now begins the second column loop > < php rewind_posts(); > < php query_posts('category_name=oranges&showposts=10'); > < php while (have_posts()) : the_post(); if (in_array($post->ID, $do_not_duplicate)) continue; <li> <h3><a href="< php the_permalink(); >" title="< php ></a></h3> < php the_excerpt(); > </li> < php endwhile; > </ul> </div><div class="column right"> <h2>Latest from <span>Lemons</span></h2> <ul> <! Now begins the third column loop > < php rewind_posts(); > < php query_posts('category_name=lemons&showposts=10'); > < php while (have_posts()) : the_post(); if (in_array($post->ID, $do_not_duplicate)) continue; <li> <h3><a href="< php the_permalink(); >" title="< php ></a></h3> < php the_excerpt(); > </li> < php endwhile; > </ul> </div>
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update_post_caches($posts); > the_title(); >">< php the_title();
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update_post_caches($posts); > the_title(); >">< php the_title();
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There you have it: four loops starting with one for featured posts, and then three more to display the latest from three different categories. This code can easily be implemented in just about any WordPress theme, but you would need to alter it to fit your category setup to make it work properly.
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Custom Fields
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Custom fields are always used within the loop, and they are database fields with content defined entirely by the user. If you take a look at the Write Post screen within the WordPress admin interface, you ll find a box for custom fields (see Figure 3-7). Here you can add one or several custom fields, and a value for each. Custom fields always belong to posts, and consist of two things: a key and a value. You can add new keys whenever you want, and when you ve used them once they show up in a drop-down box, which is nice since you may misspell or forget about them otherwise.
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Part I: The WordPress Essentials
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Figure 3-7: The Custom Fields box resides on the Write Post screen, underneath the regular Post Writing Box yes, it is easy to miss! Getting started with custom fields is easy: just write a post and add something in the key field, and then something in the value field, and click the Add Custom Field button to save. You ve now stored your custom field data, although it won t show up anywhere unless you call it within the loop. Before moving on and doing stuff with this, here s a quick recap. Each custom field (and yes you can have several per post) consists of a key and a value. The idea is to reuse the key across posts, in a way like a categorization of the kind of data you re storing, and just alter the value. The template tag you use to make things happen with custom fields is the_meta(). By default it outputs an unlimited list (or a ul tag with list items; li s, in HTML speak) displaying the post s custom fields. That works great if you just store things such as how happy you are and what you re reading right now, or perhaps a grade for a review or something. The ul will have the class post-meta and then there s a li for each custom field, and within this li there is a span with the class="post-meta-key" that wraps around the key for that particular custom field. After that is the value in plain text. Say you have a custom field with a key called Actor with the value Harrison Ford. Then you have another custom field called Director with the value Stephen Spielberg. Finally, you
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3: The Loop
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have a custom field called Movie Title with the value Indiana Jones and the Raiders of the Lost Ark. All these custom fields and their values belong to a specific post, and if you put the template tag the_meta() somewhere within the loop, and this post shows, it will output this code:
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<ul class='post-meta'> <li><span class='post-meta-key'>Actor</span> Harrison Ford</li> <li><span class='post-meta-key'>Director</span> Stephen Spielberg</li> <li><span class='post-meta-key'>Movie</span> Indiana Jones and the Raiders of the Lost Ark</ li> </ul>
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As long as you just want to display simple stuff, that is enough and you can style it with CSS. Naturally, you ll want to do more, so let s move on.
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