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Template files are the building blocks of your WordPress site. They fit together like the pieces of a puzzle to generate the web pages on your site. Some templates (the header and footer template files for example) are used on all the web pages, while others are used only under specific conditions.
A traditional web page consists of two files:
The XHTML page to hold the structure and content of the page and
the CSS Style Sheet which holds the presentation styles of the page.
In WordPress, the (X)HTML structure and the CSS style sheet are present but the content is generated 8220;behind the scenes8221; by various template files. The template files and the style sheet are stored together as a WordPress Theme. To learn more about creating Themes, read Theme Development.
The WordPress Page Structure
A simple WordPress web page structure is made up of three basic building 8220;blocks8221;: a header, the content, and a footer. Each of these blocks is generated by a template file in your current WordPress Theme.
The header contains all the information that needs to be at the top 8211; i.e. inside thetag 8211; of your XHTML web page, such as the
The content block contains the posts and pages of your blog, i.e. the 8220;meat8221; of your site.
The footer contains the information that goes at the bottom of your page, such as links to other Pages or categories on your site in a navigation menu, copyright and contact information, and other details.
Basic Template Files
To generate such a structure within a WordPress Theme, start with an index.php template file in your Theme s directory. This file has two main functions:
Include or 8220;call8221; the other template files
Include the WordPress Loop to gather information from the database (posts, pages, categories, etc.)
For our simple structure, we only need to include two other template files: the header and the footer. These must be named header.php and footer.php. The Template Tags that include them look like this:
In order to display the posts and pages of your blog (and to customize how they are being displayed), your index.php file should run the WordPress Loop between the header and footer calls.
More Complex Page Structure
Many WordPress themes include one or several sidebars that contains navigation features and more information about your website. The sidebar is generated by a template file called sidebar.php. It can be included in your index.php template file with the following template tag:
Where s the Beef?
Notice that we have not included a template tag to 8220;get8221; the content of our web page. That is because the content is generated in the WordPress Loop, inside index.php.
Also note that the Themes style sheet determines the look and placement of the header, footer, sidebar, and content in the user s browser screen. For more information on styling your WordPress Themes and web pages, see Blog Design and Layout.
Template Files Within Template Files
You have seen how WordPress includes standard template files (header, footer, and sidebar) within the index.php template file. You can also include other template files within any of your template files.
For example, sidebar.php might contain a template file that generates a search form 8211; searchform.php. Because this is not one of WordPress s standard template files, the code to include it is a little different:
We should no longer be using include and TEMPLATEPATH to get our search forms into themes as WordPress supplies the above template tag.
Most WordPress Themes include a variety of template files within other templates to generate the web pages on the site. The following template files are typical for the main template (index.php) of a WordPress site:
theloop.php (The Content)
However, this structure can be changed. For instance, you could put the search form in your header. Perhaps your design does not need a footer, so you could leave that template out entirely.
Special Template Files
WordPress features two core page views of web pages in a WordPress site. The single post view is used when the web pages displays a single post. The multi-post view lists multiple posts or post summaries, and applies to category archives, date archives, author archives, and (usually) the 8220;normal8221; view of your blog s home page. You can use the index.php template file to generate all of these types of pages or rely on WordPress template hierarchy to choose different template files depending on the situation.
The WordPress Template Hierarchy answers the following question:
What template file will WordPress use when a certain type of page is displayed?
WordPress automatically recognizes template files with certain standard names and uses them for certain types of web pages. For example, when a user clicks on the title of a blog post, WordPress knows that they want to view just that article on its own web page. The WordPress template hierarchy will use the single.php template file rather than index.php to generate the page 8211; if your Theme has a single.php file. Similarly, if the user clicks on a link for a particular category, WordPress will use the category.php template if it exists; if it doesn t, it looks for archive.php, and if that template is also missing, WordPress will go ahead and use the main index.php template. You can even make special template files for specific categories (see Category Templates for more information).