Override custom post type widgets plugin class

custom-post-type-widget-recent-post-extend.php

<?php
/**
 * Class WP_Widget_Recent_Posts_Be_will_Test
 * override custom-post-type-widget at widget-custom-post-type-recent-posts.php
 * https://wordpress.org/plugins/custom-post-type-widgets/
 */
class WP_Widget_Recent_Posts_Be_will extends WP_Widget {

	public function __construct() {
		$widget_ops = array( 'classname' => 'widget_recent_entries', 'description' => 'カスタム投稿タイプWidgetの最近の投稿' );
		parent::__construct( 'custom-post-type-recent-posts', __( 'Recent Posts (Custom Post Type)', 'custom-post-type-widgets' ), $widget_ops );
		$this->alt_option_name = 'widget_custom_post_type_recent_posts';

		add_action( 'save_post', array( &$this, 'flush_widget_cache' ) );
		add_action( 'deleted_post', array( &$this, 'flush_widget_cache' ) );
		add_action( 'switch_theme', array( &$this, 'flush_widget_cache' ) );
	}

	public function widget( $args, $instance ) {
		$cache = array();

		if ( ! $this->is_preview() ) {
			$cache = wp_cache_get( 'widget_custom_post_type_recent_posts', 'widget' );
		}

		if ( ! is_array( $cache ) ) {
			$cache = array();
		}

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

		if ( isset( $cache[ $args['widget_id'] ] ) ) {
			echo $cache[ $args['widget_id'] ];
			return;
		}

		ob_start();

		$title = apply_filters( 'widget_title', empty( $instance['title'] ) ? __( 'Recent Posts', 'custom-post-type-widgets' ) : $instance['title'], $instance, $this->id_base );
		$posttype = $instance['posttype'];
		if ( empty( $instance['number'] ) || ! $number = absint( $instance['number'] ) ) {
			$number = 5;
		}
		$show_date = isset( $instance['show_date'] ) ? $instance['show_date'] : false;

		$post_types = get_post_types( array( 'public' => true ), 'objects' );

		if ( array_key_exists( $posttype, (array) $post_types ) ) {
			$r = new WP_Query( array(
				'post_type' => $posttype,
				'posts_per_page' => $number,
				'no_found_rows' => true,
				'post_status' => 'publish',
				'ignore_sticky_posts' => true,
			) );

			if ( $r->have_posts() ) : ?>
				<?php echo $args['before_widget']; ?>
				<?php if ( $title ) {
					echo $args['before_title'] . $title . $args['after_title'];
				} ?>
				<ul>
					<?php while ( $r->have_posts() ) : $r->the_post(); ?>
						<li>
							<?php if ( $show_date ) : ?>
								<span class="post-date"><?php echo get_the_date(); ?></span>
							<?php endif; ?>
							<a href="<?php the_permalink() ?>"><?php get_the_title() ? the_title() : the_ID(); ?></a>
						</li>
					<?php endwhile; ?>
				</ul>
				<?php echo $args['after_widget']; ?>
				<?php
				wp_reset_postdata();
			endif;
		}

		if ( ! $this->is_preview() ) {
			$cache[ $args['widget_id'] ] = ob_get_flush();
			wp_cache_set( 'widget_custom_post_type_recent_posts', $cache, 'widget' );
		}
		else {
			ob_end_flush();
		}
	}

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

		$this->flush_widget_cache();

		$alloptions = wp_cache_get( 'alloptions', 'options' );
		if ( isset( $alloptions['widget_custom_post_type_recent_posts'] ) ) {
			delete_option( 'widget_custom_post_type_recent_posts' );
		}

		return $instance;
	}

	public function flush_widget_cache() {
		wp_cache_delete( 'widget_custom_post_type_recent_posts', 'widget' );
	}

	public function form( $instance ) {
		$title = isset( $instance['title'] ) ? esc_attr( $instance['title'] ) : '';
		$posttype = isset( $instance['posttype'] ) ? $instance['posttype']: 'post';
		$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:', 'custom-post-type-widgets' ); ?></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( 'posttype' ); ?>"><?php _e( 'Post Type:', 'custom-post-type-widgets' ); ?></label>
			<select name="<?php echo $this->get_field_name( 'posttype' ); ?>" id="<?php echo $this->get_field_id( 'posttype' ); ?>">
				<?php
				$post_types = get_post_types( array( 'public' => true ), 'objects' );
				foreach ( $post_types as $post_type => $value ) {
					if ( 'attachment' == $post_type ) {
						continue;
					}
					?>
					<option value="<?php echo esc_attr( $post_type ); ?>"<?php selected( $post_type, $posttype ); ?>><?php _e( $value->label, 'custom-post-type-widgets' ); ?></option>
				<?php } ?>
			</select>
		</p>

		<p><label for="<?php echo $this->get_field_id( 'number' ); ?>"><?php _e( 'Number of posts to show:', 'custom-post-type-widgets' ); ?></label>
			<input id="<?php echo $this->get_field_id( 'number' ); ?>" name="<?php echo $this->get_field_name( 'number' ); ?>" type="text" 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?', 'custom-post-type-widgets' ); ?></label></p>
		<?php
	}
}

class Custom_Post_Type_Widgets_Be_Will {
	public function __construct() {
		add_action( 'widgets_init', array( $this, 'init' ), 10 );
	}

	public function init() {
		if ( ! is_blog_installed() ) {
			return;
		}

		register_widget( 'WP_Widget_Recent_Posts_Be_will' );
	}

	public function uninstall() {}
}

include_once( ABSPATH . 'wp-admin/includes/plugin.php' );
if( is_plugin_active( 'custom-post-type-widgets/custom-post-type-widgets.php' ) ) {
	//include_once ( WP_PLUGIN_DIR . '/custom-post-type-widgets/inc/widget-custom-post-type-recent-posts.php' );
	//if( class_exists( 'WP_Custom_Post_Type_Widgets_Recent_Posts' ) )
		$custom_post_type_widgets = new Custom_Post_Type_Widgets_Be_Will();
}