View file File name : class-wp-widget-tag-cloud.php Content :<?php /** * Widget API: WP_Widget_Tag_Cloud class * * @package WordPress * @subpackage Widgets * @since 4.4.0 */ /** * Core class used to implement a Tag cloud widget. * * @since 2.8.0 * * @see WP_Widget */ class WP_Widget_Tag_Cloud extends WP_Widget { /** * Sets up a new Tag Cloud widget instance. * * @since 2.8.0 * @access public */ public function __construct() { $widget_ops = array( 'description' => __( 'A cloud of your most used tags.' ), 'customize_selective_refresh' => true, ); parent::__construct( 'tag_cloud', __( 'Tag Cloud' ), $widget_ops ); } /** * Outputs the content for the current Tag Cloud widget instance. * * @since 2.8.0 * @access public * * @param array $args Display arguments including 'before_title', 'after_title', * 'before_widget', and 'after_widget'. * @param array $instance Settings for the current Tag Cloud widget instance. */ public function widget( $args, $instance ) { $current_taxonomy = $this->_get_current_taxonomy($instance); if ( !empty($instance['title']) ) { $title = $instance['title']; } else { if ( 'post_tag' == $current_taxonomy ) { $title = __('Tags'); } else { $tax = get_taxonomy($current_taxonomy); $title = $tax->labels->name; } } /** * Filters the taxonomy used in the Tag Cloud widget. * * @since 2.8.0 * @since 3.0.0 Added taxonomy drop-down. * * @see wp_tag_cloud() * * @param array $args Args used for the tag cloud widget. */ $tag_cloud = wp_tag_cloud( apply_filters( 'widget_tag_cloud_args', array( 'taxonomy' => $current_taxonomy, 'echo' => false ) ) ); if ( empty( $tag_cloud ) ) { return; } /** This filter is documented in wp-includes/widgets/class-wp-widget-pages.php */ $title = apply_filters( 'widget_title', $title, $instance, $this->id_base ); echo $args['before_widget']; if ( $title ) { echo $args['before_title'] . $title . $args['after_title']; } echo '<div class="tagcloud">'; echo $tag_cloud; echo "</div>\n"; echo $args['after_widget']; } /** * Handles updating settings for the current Tag Cloud widget instance. * * @since 2.8.0 * @access public * * @param array $new_instance New settings for this instance as input by the user via * WP_Widget::form(). * @param array $old_instance Old settings for this instance. * @return array Settings to save or bool false to cancel saving. */ public function update( $new_instance, $old_instance ) { $instance = array(); $instance['title'] = sanitize_text_field( $new_instance['title'] ); $instance['taxonomy'] = stripslashes($new_instance['taxonomy']); return $instance; } /** * Outputs the Tag Cloud widget settings form. * * @since 2.8.0 * @access public * * @param array $instance Current settings. */ public function form( $instance ) { $current_taxonomy = $this->_get_current_taxonomy($instance); $title_id = $this->get_field_id( 'title' ); $instance['title'] = ! empty( $instance['title'] ) ? esc_attr( $instance['title'] ) : ''; echo '<p><label for="' . $title_id .'">' . __( 'Title:' ) . '</label> <input type="text" class="widefat" id="' . $title_id .'" name="' . $this->get_field_name( 'title' ) .'" value="' . $instance['title'] .'" /> </p>'; $taxonomies = get_taxonomies( array( 'show_tagcloud' => true ), 'object' ); $id = $this->get_field_id( 'taxonomy' ); $name = $this->get_field_name( 'taxonomy' ); $input = '<input type="hidden" id="' . $id . '" name="' . $name . '" value="%s" />'; switch ( count( $taxonomies ) ) { // No tag cloud supporting taxonomies found, display error message case 0: echo '<p>' . __( 'The tag cloud will not be displayed since there are no taxonomies that support the tag cloud widget.' ) . '</p>'; printf( $input, '' ); break; // Just a single tag cloud supporting taxonomy found, no need to display options case 1: $keys = array_keys( $taxonomies ); $taxonomy = reset( $keys ); printf( $input, esc_attr( $taxonomy ) ); break; // More than one tag cloud supporting taxonomy found, display options default: printf( '<p><label for="%1$s">%2$s</label>' . '<select class="widefat" id="%1$s" name="%3$s">', $id, __( 'Taxonomy:' ), $name ); foreach ( $taxonomies as $taxonomy => $tax ) { printf( '<option value="%s"%s>%s</option>', esc_attr( $taxonomy ), selected( $taxonomy, $current_taxonomy, false ), $tax->labels->name ); } echo '</select></p>'; } } /** * Retrieves the taxonomy for the current Tag cloud widget instance. * * @since 4.4.0 * @access public * * @param array $instance Current settings. * @return string Name of the current taxonomy if set, otherwise 'post_tag'. */ public function _get_current_taxonomy($instance) { if ( !empty($instance['taxonomy']) && taxonomy_exists($instance['taxonomy']) ) return $instance['taxonomy']; return 'post_tag'; } }