php 小工具自定义标签小部件标签云自定义标签云

Posted 2021-05-04

class WP_Widget_Tag_Cloud_Custom extends WP_Widget {

	function __construct() {
		$widget_ops = array( 'description' => __( "Your most used tags in cloud format") );
		parent::__construct('tag_cloud_custom', __('Tag Cloud Custom'), $widget_ops);
	}

	function widget( $args, $instance ) {
		extract($args);
		$current_taxonomy = 'post_tag';
		if ( !empty($instance['title']) ) {
			$title = $instance['title'];
		} else {
			if ( 'post_tag' == $current_taxonomy ) {
				$title = __('Tags');
			} else {
				$tax = get_taxonomy($current_taxonomy);
				$title = $tax->labels->name;
			}
		}
		
		if(!empty($instance['tagsselected'])) {
			$tagsselected = $instance['tagsselected'];
		} else {
			$tagsselected = 0;
		}
		
		$title = apply_filters('widget_title', $title, $instance, $this->id_base);

		echo $before_widget;
		if ( $title )
			echo $before_title . $title . $after_title;
		echo '<div class="tagcloud">';
			if(empty($tagsselected))
			{
				wp_tag_cloud( apply_filters('widget_tag_cloud_args', array('taxonomy' => $current_taxonomy) ) );
			}
			else
			{
				$tagsids = implode(',',$tagsselected);
				$tags = get_tags(array('include' => $tagsids));
				foreach ( $tags as $tag )
				{
					$tag_link = get_tag_link( $tag->term_id );
					echo '<a href="'.$tag_link.'" rel="tag">'.$tag->name.'</a> ';
				}
			}
		echo "</div>\n";
		echo $after_widget;
	}

	function update( $new_instance, $old_instance ) {
		$instance['title'] = strip_tags(stripslashes($new_instance['title']));
		$instance['tagsselected'] = $new_instance['tagsselected'];
		return $instance;
	}

	function form( $instance ) {

?>
	<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 if (isset ( $instance['title'])) {echo esc_attr( $instance['title'] );} ?>" />
	</p>
	<p>
		<label for="<?php echo $this->get_field_id('tagsselected'); ?>"><?php _e('Select Tags:') ?></label>
		<select class="widefat" multiple size="10" id="<?php echo $this->get_field_id('tagsselected'); ?>" name="<?php echo $this->get_field_name('tagsselected'); ?>[]">
			<?php
				$tags = get_tags();
				foreach ( $tags as $tag )
				{
					$tag_link = get_tag_link( $tag->term_id );
					$selected = '';
					
					if(in_array($tag->term_id, $instance['tagsselected']))
					{
						$selected = 'selected="selected"';
					}
					echo '<option name="'.$tag->name.'" '.$selected.' value="'.$tag->term_id.'">'.$tag->name.'</option>';
				}
			?>
    </select>
	</p>
	
	<?php
	}

}
add_action('widgets_init', create_function('', 'return register_widget("WP_Widget_Tag_Cloud_Custom");'));