> For the complete documentation index, see [llms.txt](https://learnphp.gitbook.io/learnphp/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://learnphp.gitbook.io/learnphp/wordpress-advand/21.-lay-id-cua-page-shop-ok.md).

# 21. Lấy id của page shop (ok)

![](/files/-MTxV9OpE2Q_p6Lk3esh)

![](/files/-MTxVCoUjvDpeqV8LGE3)

C:\xampp\htdocs\test\wp-content\plugins\plugin-name\includes\class-wpf\_ct.php

```
private function load_dependencies() {
    $plugindir = plugin_dir_path(dirname(__FILE__));
    require_once $plugindir . 'includes/class-wpf-utils_ct.php';
    require_once $plugindir . 'includes/class-wpf-options_ct.php';
    require_once $plugindir . 'includes/class-wpf-form_ct.php';
    require_once $plugindir . 'includes/class-wpf-widget_ct.php';
    if(is_admin()){
    	require_once $plugindir . 'includes/class-wpf-list_ct.php';
    	require_once $plugindir . 'admin/class-wpf-admin_ct.php';
    }
    if(!is_admin()){
    	require_once $plugindir . 'public/class-wpf-public_ct.php';
    }
    do_action('wpf_ct_loaded');
  }
```

C:\xampp\htdocs\test\wp-content\plugins\plugin-name\includes\class-wpf-widget\_ct.php

```
<?php

class WPF_Widget_CT extends WP_Widget {
	
	///////////////////////////////////////////
	// Feature Posts
	///////////////////////////////////////////
	function __construct() {
		/* Widget settings. */
		$widget_ops = array( 'classname' => 'themify-wpf', 'description' => __('Display Themify Products Filter Form.', 'wpf') );

		/* Widget control settings. */
		$control_ops = array( 'id_base' => 'themify-wpf' );

		/* Create the widget. */
		parent::__construct( 'themify-wpf', __( 'Themify Products Filter', 'wpf' ), $widget_ops, $control_ops );

	}

	///////////////////////////////////////////
	// Widget
	///////////////////////////////////////////
	function widget( $args, $instance ) {

		/** This filter is documented in wp-includes/default-widgets.php */
		$title = apply_filters( 'widget_title', empty( $instance['title'] ) ? '' : $instance['title'], $instance, $this->id_base );

		/* Before widget (defined by themes). */
		echo $args['before_widget'];

		if ( $title ) {
			echo $args['before_title'] , $title , $args['after_title'];
		}

		if ( isset( $instance['form'] ) ) {
			echo do_shortcode( '[searchandfilter id="' . $instance['form'] . '"]' );
		}

		/* After widget (defined by themes). */
		echo $args['after_widget'];
	}
	
	
	///////////////////////////////////////////
	// Update
	///////////////////////////////////////////
	function update( $new_instance, $old_instance ) {
		$instance = $old_instance;

		/* Strip tags (if needed) and update the widget settings. */
		$instance['title'] = strip_tags( $new_instance['title'] );
		$instance['form'] = $new_instance['form'];

		return $instance;
	}
	
	///////////////////////////////////////////
	// Form
	///////////////////////////////////////////
	function form( $instance ) {

		/* Set up some default widget settings. */
		$defaults = array(
			'title' => '',
			'form' => '',
		);
		$instance = wp_parse_args( (array) $instance, $defaults );
		$options = WPF_Options_CT::get_option( WPF_CT::get_instance()->get_plugin_name(), WPF_CT::get_instance()->get_version() )->get();
		?>
		<p>
                   
			<label for="<?php echo esc_attr( $this->get_field_id( 'title' ) ); ?>"><?php _e('Title:', 'wpf'); ?></label><br />
			<input id="<?php echo esc_attr( $this->get_field_id( 'title' ) ); ?>" name="<?php echo esc_attr( $this->get_field_name( 'title' ) ); ?>" value="<?php echo esc_attr( $instance['title'] ); ?>" class="widefat" type="text" />
		</p>
		<p>
			<label for="<?php echo esc_attr( $this->get_field_id( 'form' ) ); ?>"><?php _e( 'Form', 'wpf' ); ?></label>
			<select id="<?php echo esc_attr( $this->get_field_id( 'form' ) ); ?>" name="<?php  echo esc_attr( $this->get_field_name( 'form' ) ); ?>">
				<?php
				if ( ! empty( $options ) ) {
					foreach ( $options as $key => $form ) { ?>
						<option value="<?php echo esc_attr( $key ); ?>" <?php selected( $key, $instance['form'] ); ?>><?php echo esc_html( empty( $form['data']['name'] ) ? $key : $form['data']['name'] ); ?></option>
					<?php }
				}
				?>
			</select>
		</p>
		<?php
	}

	public static function register() {
		register_widget( __CLASS__ );
	}
}
add_action( 'widgets_init', array( 'WPF_Widget_CT', 'register' ) );
```

{% file src="/files/-MTxVh-iuAnUaXJqNL\_b" %}


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://learnphp.gitbook.io/learnphp/wordpress-advand/21.-lay-id-cua-page-shop-ok.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.