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Widgetizing Themes

What is Widgetizing?

Widgetizing is a pseudo word that describes the process of implementing Widgets and Widget Areas into your Theme.

How to Register a Widget Area

The following should be added to your Theme's functions.php file:

 * Register our sidebars and widgetized areas.
function arphabet_widgets_init() {

	register_sidebar( array(
		'name' => 'Home right sidebar',
		'id' => 'home_right_1',
		'before_widget' => '<div>',
		'after_widget' => '</div>',
		'before_title' => '<h2 class="rounded">',
		'after_title' => '</h2>',
	) );
add_action( 'widgets_init', 'arphabet_widgets_init' );

How to display new Widget Areas

You can display your new widget area by 1.adding the code directly to a theme file like the sidebar.php file or 2.using a custom function with hook in your functions.php file.

Below is the code from the latest default theme, Twenty Twelve which shows you 1 way to add your new widget area to a parent or child theme.

<?php if ( is_active_sidebar( 'sidebar-1' ) ) : ?>
	<div id="primary-sidebar" class="primary-sidebar widget-area" role="complementary">
		<?php dynamic_sidebar( 'sidebar-1' ); ?>
	</div><!-- #primary-sidebar -->
	<?php endif; ?>

The above code can be added to your sidebar.php file. It checks to see if the widget area is populated ( active ) and then displays the contents of the widget if active.

This is the function which outputs the widget:

<?php dynamic_sidebar( 'sidebar-1' ); ?>

The I.D needs to match what you use when you register the widget in your functions file.

For more information, please refer to the Widgets API to learn how to, programmatically, display Widgets and Widget Areas.

If you're not a programmer, you should refer to the WordPress Widgets page.

Create New Widget Area Using Custom Function

You can use WordPress or theme specific hooks to display new widget areas in your theme directly from your parent or child themes functions file.

function wpsites_before_post_widget($content) {
if ( is_singular(array('post', 'page')) && is_active_sidebar( 'before-post' ) && is_main_query() ) { 
	return $content;
add_filter( 'the_content', 'wpsites_before_post_widget' );

The above code displays a new widget area before all single posts and pages in any theme using the_content [1] filter however it is suggested you use theme specific hooks if your theme includes them.

Note: You will also need to register a new widget area using the same I.D as what you use in the dynamic sidebar which in this example is before-post.

register_sidebar( array(
	'name' => 'Before Posts Widget',
	'id' => 'before-post',
        'description' => __( 'Your Widget Description.', '$text_domain' ),
) );


Sidebars: is_active_sidebar(), is_dynamic_sidebar(), dynamic_sidebar(), register_sidebars(), register_sidebar(), unregister_sidebar(), wp_register_sidebar_widget(), wp_unregister_sidebar_widget(), wp_get_sidebars_widgets(), wp_set_sidebars_widgets()

Widgets: is_active_widget(), the_widget(), register_widget(), unregister_widget(), wp_register_widget_control(), wp_unregister_widget_control(), wp_convert_widget_settings(), wp_get_widget_defaults(), wp_widget_description()