6: Advanced Theme Usage in Java

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6: Advanced Theme Usage
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whole thing from there. Theme option pages have been around for quite some time, and the default WordPress theme uses the technique to offer color customizations to the rounded header, along with other things. What you want your theme options page to do, if you feel you need one, depends on the kind of theme you ve built. Some themes let the user alter the design by changing default font sizes and things like that, while others let you save custom code that will be output somewhere in the theme through action hooks. Either way, you should make sure you know why you may want an options page, and what you need it to do.
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The admin options pages can more or less be used to do just about anything. You kick it off in functions.php, but then you can call other files or just put the whole thing there. Keep it somewhat sane, though, since functions.php is part of your theme and it may slow things down if you cram it too full of cool functionality that needs to run a ton of things at once. As an example we ll take a look at the Notes Blog Core placeholder page, output by functions.php just to say hi, more or less. First of all, you need to add the menu item to the WordPress admin. That means you need to add an action, and define the theme s option page: 129
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add_action('admin_menu', 'nbcore_menu'); function nbcore_menu() { add_theme_page('Notes Blog Core', 'Notes Blog Core', 8, 'your-unique-identi er', 'nbcore_options'); }
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Remember, all this is in between PHP tags within functions.php. The first line adds an action, the admin_menu one actually, and then you re adding the nbcore_menu function to it. Next, you define the nbcore_menu() function and load it with add_theme_page. This in turn consists of the name of the page, the title of the page (obviously identical in this case), the user level needed to see the page, and then a nonexistent unique identifier (which can be a file as well as some identifying string), and finally the function for the actual page HTML content, which we ll get to next:
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function nbcore_options() { echo '<div class="wrap">'; echo ' <h2>Notes Blog Core</h2> <p>This is a placeholder for upcoming admin options for the Notes Blog Core theme. These things aren\'t due yet, in fact, they are pretty far away, so just forget about this page for now huh </p>
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Part II: Designing and Developing WordPress Themes
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<p>Get the latest Notes Blog and Notes Blog Core news from <a href="http://notesblog. com" title="Notes Blog">http://notesblog.com</a> - it\'s that sweet!</p> '; echo '</div>'; } >
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Here, you basically just store the nbcore_options() function with the page you want to output in the admin interface. By putting a containing div with the 'wrap' class around it all, you get the WordPress admin interface look, so you probably want to be doing that. The three echo statements are simple enough; it is all normal HTML code, with backslashes in front of single quotation marks to avoid it breaking the echo string. Nothing fancy, it is just a placeholder theme options page after all. Here is the full code:
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< php add_action('admin_menu', 'nbcore_menu'); function nbcore_menu() { add_theme_page('Notes Blog Core', 'Notes Blog Core', 8, 'your-unique-identi er', 'nbcore_ options'); } function nbcore_options() { echo '<div class="wrap">'; echo ' <h2>Notes Blog Core</h2> <p>This is a placeholder for upcoming admin options for the Notes Blog Core theme. These things aren\'t due yet, in fact, they are pretty far away, so just forget about this page for now huh </p> <p>Get the latest Notes Blog and Notes Blog Core news from <a href="http://notesblog.com" title="Notes Blog">http://notesblog.com</a> - it\'s that sweet!</p> '; echo '</div>'; } >
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Want to save stuff and add cool functionality We ll dig deeper into that in the following chapters, dealing with WordPress plugin development. That s basically where you re at when you ve gotten this far: you re doing a WordPress plugin, but in your theme s functions.php file.
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