WP_Widget_Tag_Cloud::form() WordPress Method

	public function form( $instance ) {
		$title = ! empty( $instance['title'] ) ? $instance['title'] : '';
		$count = isset( $instance['count'] ) ? (bool) $instance['count'] : false;
		?>
		<p>
			<label for="<?php echo $this->get_field_id( 'title' ); ?>"><?php _e( 'Title:' ); ?></label>
			<input type="text" class="widefat" id="<?php echo $this->get_field_id( 'title' ); ?>" name="<?php echo $this->get_field_name( 'title' ); ?>" value="<?php echo esc_attr( $title ); ?>" />
		</p>
		<?php
		$taxonomies       = get_taxonomies( array( 'show_tagcloud' => true ), 'object' );
		$current_taxonomy = $this->_get_current_taxonomy( $instance );

		switch ( count( $taxonomies ) ) {

			// No tag cloud supporting taxonomies found, display error message.
			case 0:
				?>
				<input type="hidden" id="<?php echo $this->get_field_id( 'taxonomy' ); ?>" name="<?php echo $this->get_field_name( 'taxonomy' ); ?>" value="" />
				<p>
					<?php _e( 'The tag cloud will not be displayed since there are no taxonomies that support the tag cloud widget.' ); ?>
				</p>
				<?php
				break;

			// Just a single tag cloud supporting taxonomy found, no need to display a select.
			case 1:
				$keys     = array_keys( $taxonomies );
				$taxonomy = reset( $keys );
				?>
				<input type="hidden" id="<?php echo $this->get_field_id( 'taxonomy' ); ?>" name="<?php echo $this->get_field_name( 'taxonomy' ); ?>" value="<?php echo esc_attr( $taxonomy ); ?>" />
				<?php
				break;

			// More than one tag cloud supporting taxonomy found, display a select.
			default:
				?>
				<p>
					<label for="<?php echo $this->get_field_id( 'taxonomy' ); ?>"><?php _e( 'Taxonomy:' ); ?></label>
					<select class="widefat" id="<?php echo $this->get_field_id( 'taxonomy' ); ?>" name="<?php echo $this->get_field_name( 'taxonomy' ); ?>">
					<?php foreach ( $taxonomies as $taxonomy => $tax ) : ?>
						<option value="<?php echo esc_attr( $taxonomy ); ?>" <?php selected( $taxonomy, $current_taxonomy ); ?>>
							<?php echo esc_html( $tax->labels->name ); ?>
						</option>
					<?php endforeach; ?>
					</select>
				</p>
				<?php
		}

		if ( count( $taxonomies ) > 0 ) {
			?>
			<p>
				<input type="checkbox" class="checkbox" id="<?php echo $this->get_field_id( 'count' ); ?>" name="<?php echo $this->get_field_name( 'count' ); ?>" <?php checked( $count, true ); ?> />
				<label for="<?php echo $this->get_field_id( 'count' ); ?>"><?php _e( 'Show tag counts' ); ?></label>
			</p>
			<?php
		}
	}