is_dynamic_sidebar()

Whether the dynamic sidebar is enabled and used by theme.

Return

(bool) True, if using widgets. False, if not using widgets.

Source

File: wp-includes/widgets.php 

function is_dynamic_sidebar() {
	global $wp_registered_widgets, $wp_registered_sidebars;
	$sidebars_widgets = get_option('sidebars_widgets');
	foreach ( (array) $wp_registered_sidebars as $index => $sidebar ) {
		if ( ! empty( $sidebars_widgets[ $index ] ) ) {
			foreach ( (array) $sidebars_widgets[$index] as $widget )
				if ( array_key_exists($widget, $wp_registered_widgets) )
					return true;
		}
	}
	return false;
}

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Related

Uses

Uses
Uses Description
wp-includes/option.php: get_option()

Retrieves an option value based on an option name.

Changelog

Changelog
Version Description
WP-2.2.0 Introduced.