As the sun rises and the forest mist clears, and the clouds return and the caves darken, these changes of light and shadow are the morning and evening in the mountains. Wildflowers bloom with their subtle fragrance, fine trees flourish with their dense shade, the wind and frost are pure and clean, and the water recedes to reveal the rocks—these are the four seasons in the mountains. Going out in the morning and returning in the evening, the scenery of the four seasons is different, and the joy is endless.至于负者歌于途,行者休于树,前者呼,后者应,伛偻提携,往来而不绝者,滁人游也。临溪而渔,溪深而鱼肥,酿泉为酒,泉香而酒洌,山肴野蔌,杂然而前陈者,太守宴也。宴酣之乐,非丝非竹,射者中,弈者胜,觥筹交错,起坐而喧哗者,众宾欢也。苍颜白发,颓然乎其间者,太守醉也。
<?php
/**
* Widget API: WP_Widget_Pages class
*
* @package WordPress
* @subpackage Widgets
* @since 4.4.0
*/
/**
* Core class used to implement a Pages widget.
*
* @since 2.8.0
*
* @see WP_Widget
*/
class WP_Widget_Pages extends WP_Widget {
/**
* Sets up a new Pages widget instance.
*
* @since 2.8.0
*/
public function __construct() {
$widget_ops = array(
'classname' => 'widget_pages',
'description' => __( 'A list of your site’s Pages.' ),
'customize_selective_refresh' => true,
'show_instance_in_rest' => true,
);
parent::__construct( 'pages', __( 'Pages' ), $widget_ops );
}
/**
* Outputs the content for the current Pages widget instance.
*
* @since 2.8.0
*
* @param array $args Display arguments including 'before_title', 'after_title',
* 'before_widget', and 'after_widget'.
* @param array $instance Settings for the current Pages widget instance.
*/
public function widget( $args, $instance ) {
$default_title = __( 'Pages' );
$title = ! empty( $instance['title'] ) ? $instance['title'] : $default_title;
/**
* Filters the widget title.
*
* @since 2.6.0
*
* @param string $title The widget title. Default 'Pages'.
* @param array $instance Array of settings for the current widget.
* @param mixed $id_base The widget ID.
*/
$title = apply_filters( 'widget_title', $title, $instance, $this->id_base );
$sortby = empty( $instance['sortby'] ) ? 'menu_order' : $instance['sortby'];
$exclude = empty( $instance['exclude'] ) ? '' : $instance['exclude'];
if ( 'menu_order' === $sortby ) {
$sortby = 'menu_order, post_title';
}
$output = wp_list_pages(
/**
* Filters the arguments for the Pages widget.
*
* @since 2.8.0
* @since 4.9.0 Added the `$instance` parameter.
*
* @see wp_list_pages()
*
* @param array $args An array of arguments to retrieve the pages list.
* @param array $instance Array of settings for the current widget.
*/
apply_filters(
'widget_pages_args',
array(
'title_li' => '',
'echo' => 0,
'sort_column' => $sortby,
'exclude' => $exclude,
),
$instance
)
);
if ( ! empty( $output ) ) {
echo $args['before_widget'];
if ( $title ) {
echo $args['before_title'] . $title . $args['after_title'];
}
$format = current_theme_supports( 'html5', 'navigation-widgets' ) ? 'html5' : 'xhtml';
/** This filter is documented in wp-includes/widgets/class-wp-nav-menu-widget.php */
$format = apply_filters( 'navigation_widgets_format', $format );
if ( 'html5' === $format ) {
// The title may be filtered: Strip out HTML and make sure the aria-label is never empty.
$title = trim( strip_tags( $title ) );
$aria_label = $title ? $title : $default_title;
echo '<nav aria-label="' . esc_attr( $aria_label ) . '">';
}
?>
<ul>
<?php echo $output; ?>
</ul>
<?php
if ( 'html5' === $format ) {
echo '</nav>';
}
echo $args['after_widget'];
}
}
/**
* Handles updating settings for the current Pages widget instance.
*
* @since 2.8.0
*
* @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 Updated settings to save.
*/
public function update( $new_instance, $old_instance ) {
$instance = $old_instance;
$instance['title'] = sanitize_text_field( $new_instance['title'] );
if ( in_array( $new_instance['sortby'], array( 'post_title', 'menu_order', 'ID' ), true ) ) {
$instance['sortby'] = $new_instance['sortby'];
} else {
$instance['sortby'] = 'menu_order';
}
$instance['exclude'] = sanitize_text_field( $new_instance['exclude'] );
return $instance;
}
/**
* Outputs the settings form for the Pages widget.
*
* @since 2.8.0
*
* @param array $instance Current settings.
*/
public function form( $instance ) {
// Defaults.
$instance = wp_parse_args(
(array) $instance,
array(
'sortby' => 'post_title',
'title' => '',
'exclude' => '',
)
);
?>
<p>
<label for="<?php echo esc_attr( $this->get_field_id( 'title' ) ); ?>"><?php _e( 'Title:' ); ?></label>
<input class="widefat" id="<?php echo esc_attr( $this->get_field_id( 'title' ) ); ?>" name="<?php echo esc_attr( $this->get_field_name( 'title' ) ); ?>" type="text" value="<?php echo esc_attr( $instance['title'] ); ?>" />
</p>
<p>
<label for="<?php echo esc_attr( $this->get_field_id( 'sortby' ) ); ?>"><?php _e( 'Sort by:' ); ?></label>
<select name="<?php echo esc_attr( $this->get_field_name( 'sortby' ) ); ?>" id="<?php echo esc_attr( $this->get_field_id( 'sortby' ) ); ?>" class="widefat">
<option value="post_title"<?php selected( $instance['sortby'], 'post_title' ); ?>><?php _e( 'Page title' ); ?></option>
<option value="menu_order"<?php selected( $instance['sortby'], 'menu_order' ); ?>><?php _e( 'Page order' ); ?></option>
<option value="ID"<?php selected( $instance['sortby'], 'ID' ); ?>><?php _e( 'Page ID' ); ?></option>
</select>
</p>
<p>
<label for="<?php echo esc_attr( $this->get_field_id( 'exclude' ) ); ?>"><?php _e( 'Exclude:' ); ?></label>
<input type="text" value="<?php echo esc_attr( $instance['exclude'] ); ?>" name="<?php echo esc_attr( $this->get_field_name( 'exclude' ) ); ?>" id="<?php echo esc_attr( $this->get_field_id( 'exclude' ) ); ?>" class="widefat" />
<br />
<small><?php _e( 'Page IDs, separated by commas.' ); ?></small>
</p>
<?php
}
}