Custom WordPress Simple Date Widget

date-widget.php

<?php

class Custom_Page_Title_Widget extends WP_Widget {

    /**
     * Register widget with WordPress.
     */
    public function __construct() {
        parent::__construct(
            'custom_page_title_widget', // Base ID
            esc_html__( 'Custom Page Title Widget', 'text_domain' ), // Name
            array( 'description' => esc_html__( 'Add a Custom Page Title to your pages', 'text_domain' ), ) // Args
        );
    }

    /**
     * Front-end display of widget.
     *
     * @see WP_Widget::widget()
     *
     * @param array $args     Widget arguments.
     * @param array $instance Saved values from database.
     */
    public function widget( $args, $instance ) {
        $title = apply_filters( 'widget_title', $instance['title'] );
        
        // Get the current post object
        global $post;
        
        // Output the custom page title if it exists
        if ( isset( $post->ID ) && get_post_meta( $post->ID, 'custom_page_title', true ) ) {
            echo $args['before_widget'];
            if ( ! empty( $title ) ) {
                echo $args['before_title'] . $title . $args['after_title'];
            }
            echo '<h1>' . get_post_meta( $post->ID, 'custom_page_title', true ) . '</h1>';
            echo $args['after_widget'];
        } else {
            return;
        }
    }

    /**
     * Sanitize widget form values as they are saved.
     *
     * @see WP_Widget::update()
     *
     * @param array $new_instance Values just sent to be saved.
     * @param array $old_instance Previously saved values from database.
     *
     * @return array Updated safe values to be saved.
     */
    public function update( $new_instance, $old_instance ) {
        $instance = array();
        $instance['title'] = sanitize_text_field( $new_instance['title'] );

        if ( ! current_user_can( 'manage_options' ) ) {
            return;
        }

        if ( isset( $new_instance['nonce'] ) && wp_verify_nonce( $new_instance['nonce'], 'custom_page_title_widget' ) ) {
            return $instance;
        }
        return;
    }

    /**
     * Back-end widget form.
     *
     * @see WP_Widget::form()
     *
     * @param array $instance Previously saved values from database.
     */
    public function form( $instance ) {

        // Get title
        $title = ! empty( $instance['title'] ) ? $instance['title'] : esc_html__( 'New title', 'text_domain' );

        // Widget nonce
        $nonce = wp_create_nonce( 'custom_page_title_widget' );

        ?>
        <p>
            <label for="<?php echo $this->get_field_id( 'title' ); ?>"><?php esc_attr_e( 'Title:', 'text_domain' ); ?></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 esc_attr( $title ); ?>">
        </p>
        <input type="hidden" name="<?php echo $this->get_field_name( 'nonce' ); ?>" value="<?php echo esc_attr( $nonce ); ?>">
        <?php

    }

}

/* This code should add a new widget called Custom Page Title Widget to your WordPress site. 
 The widget will allow you to add a custom page title to any page on your site. 
 To use the widget, simply drag it into a widget area in your WordPress Dashboard, fill in the title you want to display on the widget, 
 save the changes, and the widget should appear on the front-end of your site.
*/