How to add extra date option with published and last modified date?
To do this, put this code in functions.php of your wordpress site.
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// Add custom meta box for selecting last date of post function custom_last_date_meta_box() { add_meta_box( 'custom-last-date-meta-box', 'Last Date of Post', 'custom_last_date_meta_box_callback', 'post', 'side', 'default' ); } add_action('add_meta_boxes', 'custom_last_date_meta_box'); // Callback function to display the custom meta box function custom_last_date_meta_box_callback($post) { // Retrieve the current last date of the post, if available $last_date = get_post_meta($post->ID, 'custom_last_date', true); ?> <label for="custom_last_date">Select the last date of the post:</label> <input type="date" id="custom_last_date" name="custom_last_date" value="<?php echo esc_attr($last_date); ?>" /> <?php } // Save custom meta box data function save_custom_last_date_meta_box_data($post_id) { // Check if this is an autosave if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) { return; } // Check if nonce is set if (!isset($_POST['custom_last_date_meta_box_nonce'])) { return; } // Verify that the nonce is valid if (!wp_verify_nonce($_POST['custom_last_date_meta_box_nonce'], 'custom_last_date_meta_box')) { return; } // Check if user has permissions to save post data if (!current_user_can('edit_post', $post_id)) { return; } // Save the custom last date if (isset($_POST['custom_last_date'])) { update_post_meta($post_id, 'custom_last_date', sanitize_text_field($_POST['custom_last_date'])); } } add_action('save_post', 'save_custom_last_date_meta_box_data'); |