Advanced PHP code for wordpress

Content Only For The Home Page
<?php if ( is_home() ) { include (‘example.php’); } ?>
This snippet will include the file specified, only if the user is on the home page of the site. Place this code in the index.php file.
Styling Different Categories
<?php if ( is_category(’15’) ) {
<link rel=”stylesheet” href=”<?php bloginfo(‘template_url’); ?>/cat-15.css”
type=”text/css” media=”screen” />;
<?php } else { ?>
<link rel=”stylesheet” href=”<?php bloginfo(‘stylesheet_url’); ?>”
type=”text/css” media=”screen” />
<?php } ?>
This snippet assigns a specific stylesheet (category-15.css) to category 15 and will assign the rest of the site the default stylesheet (style.css). Place this code in the <head> area.
Unique Images For Different Categories
<?php if (is_category(‘7’) ):
<img src='<?php bloginfo(‘template_url’); ?>/images/cat7.jpg’ alt=” />
<?php } elseif (is_category(‘8’) ):
<img src='<?php bloginfo(‘template_url’); ?>/images/cat8.jpg’ alt=” />
<?php endif; ?>
This snippet assigns an image (cat7.jpg) next to each post title in category 7 and an image (cat8.jpg) next to each post title in category 8. Place this code in the category.php file.
Styling Individual Posts
<div id=”post-<?php the_ID(); ?>”>
This snippet will assign the post ID to the DIV. For example, if the ID for the post is 8, that line will echo as
<div id=”post-8”></div>. Now you can style that individual post in the CSS as #post-8. Place this code
within the loop.
Previous & Next Posts Links
<?php next_posts_link(‘Next Entries &raquo;’) ?>
<?php previous_post_link(‘&laquo; Older Entries’); ?>
The first snippet will echo “Next Entries »” with a link to the next set of posts. The second snippet will echo “« Previous Entries” with a link to the previous set of posts. Place this code outside the loop.
Site Page Links
<ul>
<li<?php if(is_home()) { ?> class=”current_page_item”<?php } ?>><a href=”
<?php bloginfo(‘home’); ?>”>home</a></li>
<?php wp_list_pages(‘sort_column=menu_order&depth=1&title_li=’); ?>
</ul>
This snippet will first echo the text “home” with a link to the home page. Next, it will echo the WordPress pages links in a list, in order defined by your settings, excluding the child pages, and excluding a title header for the list. If one of the pages in the list is active, the link for that page will be assigned the class “current_page_item”, which can now be styled in your CSS. Place this code in the template files.
Dynamic Page Titles
<?php
if (is_home()) { echo bloginfo(‘name’); } elseif (is_404()) { echo ‘ 404’; } elseif
(is_search()) { echo ‘ Search Results’; } else { echo ‘WPCandy » ‘; wp_title(”); }
?>
If the home page is active, the title will display the name of the site. If the 404 page is active, the title will echo ‘ 404’. If the Search Results page is active, the title will echo ‘ Search Results’. If any other page on the site is active, the title will display ‘WPCandy » [page name]’. Place this code in the <head> area.
Query Posts
<?php query_posts(‘cat=2&showposts=5’); ?>
This snippet will display the 5 latest posts from only category 2. Place this code right before the loop.
Unique Templates For Categories
<?php $post = $wp_query- >post;
if ( in_category(‘3’) ) {
include(TEMPLATEPATH . ‘/cat3.php’);
} elseif ( in_category(‘4’) ) {
include(TEMPLATEPATH . ‘/cat4.php’);
} else {
include(TEMPLATEPATH . ‘/cat.php’);
}?>
This snippet will assign a unique template to certain categories. In this case, ‘cat3.php’ will be assigned to ‘Category 3’, ‘cat4.php’ will be assigned to Category 4’, and the rest of the categories will be assigned ‘cat.php’. Place this code at the top of category.php.
Tag Cloud
<?php wp_tag_cloud(‘smallest=1&largest=9&’); ?>
This snippet will create a tag cloud, in alphabetical order, with the smallest text at 1 pt and the largest text at 9 pts.
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