and Jigoshop search has this
<?php
/**
* Product Search Widget
*
* DISCLAIMER
*
* Do not edit or add directly to this file if you wish to upgrade Jigoshop to newer
* versions in the future. If you wish to customise Jigoshop core for your needs,
* please use our GitHub repository to publish essential changes for consideration.
*
* @package Jigoshop
* @category Widgets
* @author Jigoshop
* @copyright Copyright ? 2011-2013 Jigoshop.
* @license https://jigoshop.com/license/commercial-edition
*/
class Jigoshop_Widget_Product_Search extends WP_Widget {
/**
* Constructor
*
* Setup the widget with the available options
*/
public function __construct() {
$options = array(
'classname' => 'jigoshop_product_search',
'description' => __( 'A search form for your products', 'jigoshop' )
);
// Create the widget
parent::__construct('jigoshop_product_search', __('Jigoshop: Product Search', 'jigoshop'), $options);
}
/**
* Widget
*
* Display the widget in the sidebar
*
* @param array sidebar arguments
* @param array instance
*/
public function widget( $args, $instance ) {
// Extract the widget arguments
extract( $args );
// Set the widget title
$title = apply_filters(
'widget_title',
( $instance['title'] ) ? $instance['title'] : __( 'Product Search', 'jigoshop' ),
$instance,
$this->id_base
);
// Print the widget wrapper & title
echo $before_widget;
echo $before_title . $title . $after_title;
// Construct the form
$form = '<form role="search" method="get" id="searchform" action="' . home_url() . '">';
$form .= '<div>';
$form .= '<label class="assistive-text" for="s">' . __('Search for:', 'jigoshop') . '</label>';
$form .= '<input type="text" value="' . get_search_query() . '" name="s" id="s" placeholder="' . __('Search for products', 'jigoshop') . '" />';
$form .= '<input type="submit" id="searchsubmit" value="' . __('Search', 'jigoshop') . '" />';
$form .= '<input type="hidden" name="post_type" value="product" />';
$form .= '</div>';
$form .= '</form>';
// Apply a filter to allow for additional fields
echo apply_filters('jigoshop_product_search_form', $form, $instance, $this->id_base);
// Print closing widget wrapper
echo $after_widget;
}
/**
* Update
*
* Handles the processing of information entered in the wordpress admin
*
* @param array new instance
* @param array old instance
* @return array instance
*/
public function update( $new_instance, $old_instance ) {
$instance = $old_instance;
// Save the new values
$instance['title'] = strip_tags($new_instance['title']);
return $instance;
}
/**
* Form
*
* Displays the form for the wordpress admin
*
* @param array instance
*/
public function form( $instance ) {
// Get instance data
$title = isset( $instance['title'] ) ? esc_attr( $instance['title'] ) : null;
// Widget title
echo "
<p>
<label for='{$this->get_field_id( 'title' )}'>" . __( 'Title:', 'jigoshop' ) . "</label>
<input class='widefat' id='{$this->get_field_id( 'title' )}' name='{$this->get_field_name( 'title' )}' type='text' value='{$title}' />
</p>";
}
} // Jigoshop_Widget_Product_Search
