WordPress 更新順ウィジェット

以前は最新投稿ウィジェットを更新順に並び替えるカスタマイズをしていたが、バージョンアップの時にもとに戻ってしまうので専用で作成することにした。

wp-includes/widgets/class-wp-widget-modified-posts.php
を作成する。

以下は手動で記入する。

add_action( 'widgets_init', 'add_widgets' );

function add_widgets() {
  register_widget( 'modified_widget' );
}

class modified_widget extends WP_Widget {

  function __construct() {
    $widget_ops = array(
      'classname' => 'modified_widget_class',
      'description' => ''
    );
    parent::__construct( 'modified_widget', '投稿(更新順)', $widget_ops );
	}

add_action( 'widgets_init', 'add_widgets' );

function add_widgets() {

register_widget( 'modified_widget' );

}

class modified_widget extends WP_Widget {

function __construct() {

$widget_ops = array(

'classname' => 'modified_widget_class',

'description' => ''

);

parent::__construct( 'modified_widget', '投稿(更新順)', $widget_ops );

}

残りの部分は、
wp-includes/widgets/class-wp-widget-recent-posts.php
からwidget,update,formをそのままコピーし、
以下の通り変更。

$r = new WP_Query()
の中にある配列に以下を追加する。
‘orderby’=>’modified’

<span class="post-date">
<?php echo get_the_date( '', $recent_post->ID ); ?>
</span>

<?php echo get_the_date( '', $recent_post->ID ); ?>

</span>

を

<span class="post-date"><br>
更新：<?php echo get_the_modified_date('Y-m-d',$recent_post->ID); ?>
&nbsp;&#047;&nbsp;
投稿：<?php echo get_the_date('Y-m-d',$recent_post->ID); ?>
</span>

更新：<?php echo get_the_modified_date('Y-m-d',$recent_post->ID); ?>

投稿：<?php echo get_the_date('Y-m-d',$recent_post->ID); ?>

</span>

に変更。

<?php

add_action( 'widgets_init', 'add_widgets' );

function add_widgets() {
  register_widget( 'modified_widget' );
}

class modified_widget extends WP_Widget {

  function __construct() {
    $widget_ops = array(
      'classname' => 'modified_widget_class',
      'description' => ''
    );
    parent::__construct( 'modified_widget', '投稿(更新順)', $widget_ops );
	}
	
	public function widget( $args, $instance ) {

		if ( ! isset( $args['widget_id'] ) ) {
			$args['widget_id'] = $this->id;
		}

		$title = ( ! empty( $instance['title'] ) ) ? $instance['title'] : __( 'Recent Posts' );
		$title = apply_filters( 'widget_title', $title, $instance, $this->id_base );

		$number = ( ! empty( $instance['number'] ) ) ? absint( $instance['number'] ) : 5;
		if ( ! $number ) {
			$number = 5;
		}
		$show_date = isset( $instance['show_date'] ) ? $instance['show_date'] : false;

		$r = new WP_Query(

			apply_filters(
				'widget_posts_args',
				array(
					'posts_per_page'      => $number,
					'no_found_rows'       => true,
					'post_status'         => 'publish',
					'ignore_sticky_posts' => true,
					'orderby'             => 'modified',
				),
				$instance
			)
		);

		if ( ! $r->have_posts() ) {
			return;
		}

		?>
		<?php echo $args['before_widget']; ?>
		<?php
		if ( $title ) {
			echo $args['before_title'] . $title . $args['after_title'];
		}
		?>
		<ul>
			<?php foreach ( $r->posts as $recent_post ) : ?>
				<?php
				$post_title   = get_the_title( $recent_post->ID );
				$title        = ( ! empty( $post_title ) ) ? $post_title : __( '(no title)' );
				$aria_current = '';

				if ( get_queried_object_id() === $recent_post->ID ) {
					$aria_current = ' aria-current="page"';
				}
				?>

				<li>
					<a href="<?php the_permalink( $recent_post->ID ); ?>"<?php echo $aria_current; ?>><?php echo $title; ?></a>
					<?php if ( $show_date ) : ?>
						<span class="post-date"><br>
						更新：<?php echo get_the_modified_date('Y-m-d',$recent_post->ID); ?>
						&nbsp;&#047;&nbsp;
						投稿：<?php echo get_the_date('Y-m-d',$recent_post->ID); ?>
						</span>
					<?php endif; ?>
				</li>
			<?php endforeach; ?>
		</ul>
		<?php
		echo $args['after_widget'];
	}

	public function update( $new_instance, $old_instance ) {
		$instance              = $old_instance;
		$instance['title']     = sanitize_text_field( $new_instance['title'] );
		$instance['number']    = (int) $new_instance['number'];
		$instance['show_date'] = isset( $new_instance['show_date'] ) ? (bool) $new_instance['show_date'] : false;
		return $instance;
	}

	public function form( $instance ) {

		$title     = isset( $instance['title'] ) ? esc_attr( $instance['title'] ) : '';
		$number    = isset( $instance['number'] ) ? absint( $instance['number'] ) : 5;
		$show_date = isset( $instance['show_date'] ) ? (bool) $instance['show_date'] : false;

		?>
		<p><label for="<?php echo $this->get_field_id( 'title' ); ?>"><?php _e( 'Title:' ); ?></label>
		<input class="widefat" id="<?php echo $this->get_field_id( 'title' ); ?>" name="<?php echo $this->get_field_name( 'title' ); ?>" type="text" value="<?php echo $title; ?>" /></p>

		<p><label for="<?php echo $this->get_field_id( 'number' ); ?>"><?php _e( 'Number of posts to show:' ); ?></label>
		<input class="tiny-text" id="<?php echo $this->get_field_id( 'number' ); ?>" name="<?php echo $this->get_field_name( 'number' ); ?>" type="number" step="1" min="1" value="<?php echo $number; ?>" size="3" /></p>

		<p><input class="checkbox" type="checkbox"<?php checked( $show_date ); ?> id="<?php echo $this->get_field_id( 'show_date' ); ?>" name="<?php echo $this->get_field_name( 'show_date' ); ?>" />
		<label for="<?php echo $this->get_field_id( 'show_date' ); ?>"><?php _e( 'Display post date?' ); ?></label></p>
		<?php

	}
}

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<?php

add_action( 'widgets_init', 'add_widgets' );

function add_widgets() {

register_widget( 'modified_widget' );

}

class modified_widget extends WP_Widget {

function __construct() {

$widget_ops = array(

'classname' => 'modified_widget_class',

'description' => ''

);

parent::__construct( 'modified_widget', '投稿(更新順)', $widget_ops );

}

public function widget( $args, $instance ) {

if ( ! isset( $args['widget_id'] ) ) {

$args['widget_id'] = $this->id;

}

$title = ( ! empty( $instance['title'] ) ) ? $instance['title'] : __( 'Recent Posts' );

$title = apply_filters( 'widget_title', $title, $instance, $this->id_base );

$number = ( ! empty( $instance['number'] ) ) ? absint( $instance['number'] ) : 5;

if ( ! $number ) {

$number = 5;

}

$show_date = isset( $instance['show_date'] ) ? $instance['show_date'] : false;

$r = new WP_Query(

apply_filters(

'widget_posts_args',

array(

'posts_per_page' => $number,

'no_found_rows' => true,

'post_status' => 'publish',

'ignore_sticky_posts' => true,

'orderby' => 'modified',

$instance

)

);

if ( ! $r->have_posts() ) {

return;

}

<?php echo $args['before_widget']; ?>

<?php

if ( $title ) {

echo $args['before_title'] . $title . $args['after_title'];

}

<ul>

<?php foreach ( $r->posts as $recent_post ) : ?>

<?php

$post_title = get_the_title( $recent_post->ID );

$title = ( ! empty( $post_title ) ) ? $post_title : __( '(no title)' );

$aria_current = '';

if ( get_queried_object_id() === $recent_post->ID ) {

$aria_current = ' aria-current="page"';

}

<li>

<?php if ( $show_date ) : ?>

更新：<?php echo get_the_modified_date('Y-m-d',$recent_post->ID); ?>

投稿：<?php echo get_the_date('Y-m-d',$recent_post->ID); ?>

</span>

<?php endif; ?>

</li>

<?php endforeach; ?>

</ul>

<?php

echo $args['after_widget'];

}

public function update( $new_instance, $old_instance ) {

$instance = $old_instance;

$instance['title'] = sanitize_text_field( $new_instance['title'] );

$instance['number'] = (int) $new_instance['number'];

$instance['show_date'] = isset( $new_instance['show_date'] ) ? (bool) $new_instance['show_date'] : false;

return $instance;

}

public function form( $instance ) {

$title = isset( $instance['title'] ) ? esc_attr( $instance['title'] ) : '';

$number = isset( $instance['number'] ) ? absint( $instance['number'] ) : 5;

$show_date = isset( $instance['show_date'] ) ? (bool) $instance['show_date'] : false;

<p><label for="<?php echo $this->get_field_id( 'title' ); ?>"><?php _e( 'Title:' ); ?></label>

<input class="widefat" id="<?php echo $this->get_field_id( 'title' ); ?>" name="<?php echo $this->get_field_name( 'title' ); ?>" type="text" value="<?php echo $title; ?>" /></p>

<p><label for="<?php echo $this->get_field_id( 'number' ); ?>"><?php _e( 'Number of posts to show:' ); ?></label>

<input class="tiny-text" id="<?php echo $this->get_field_id( 'number' ); ?>" name="<?php echo $this->get_field_name( 'number' ); ?>" type="number" step="1" min="1" value="<?php echo $number; ?>" size="3" /></p>

<p><input class="checkbox" type="checkbox"<?php checked( $show_date ); ?> id="<?php echo $this->get_field_id( 'show_date' ); ?>" name="<?php echo $this->get_field_name( 'show_date' ); ?>" />

<label for="<?php echo $this->get_field_id( 'show_date' ); ?>"><?php _e( 'Display post date?' ); ?></label></p>

<?php

}

＊＊＊

有効化について

wp-includes/default-widgets.php
に以下を追加。
require_once ABSPATH . WPINC . ‘/widgets/class-wp-widget-modified-posts.php’;

あるいは以下の方法。

wp-content/plugins
の中に
modified-posts.php
を作成し以下を記入。

<?php

//Plugin Name: Modified Posts

require_once ABSPATH . WPINC . '/widgets/class-wp-widget-modified-posts.php';

<?php

//Plugin Name: Modified Posts

require_once ABSPATH . WPINC . '/widgets/class-wp-widget-modified-posts.php';

そうすると、
管理画面＞プラグイン
にModified Postsと表示されるので有効化する。