我有一个创建新会话的php函数（WC（）-〉session-〉set）。
我想在网站的头上做一个链接，调用一个函数来删除该会话（WC（）-〉session-〉set（'the_session'，null）;
应该怎么做？找不到方法：（
我尝试在函数上使用$_ get，但没有成功
编辑：
这里是代码IM使用，它添加的选项来编辑订单已经作出：

/**
 * @snippet       Edit Order Functionality @ WooCommerce My Account Page
 * @how-to        Get CustomizeWoo.com FREE
 * @sourcecode    https://businessbloomer.com/?p=91893
 * @author        Rodolfo Melogli
 * @compatible    WooCommerce 4.1
 * @donate $9     https://businessbloomer.com/bloomer-armada/
 */
  
// ----------------
// 1. Allow Order Again for Processing Status
  
add_filter( 'woocommerce_valid_order_statuses_for_order_again', 'bbloomer_order_again_statuses' );
  
function bbloomer_order_again_statuses( $statuses ) {
    $statuses[] = 'processing';
    return $statuses;
}
  
// ----------------
// 2. Add Order Actions @ My Account
  
add_filter( 'woocommerce_my_account_my_orders_actions', 'bbloomer_add_edit_order_my_account_orders_actions', 50, 2 );
  
function bbloomer_add_edit_order_my_account_orders_actions( $actions, $order ) {
    if ( $order->has_status( 'processing' ) ) {
        $actions['edit-order'] = array(
            'url'  => wp_nonce_url( add_query_arg( array( 'order_again' => $order->get_id(), 'edit_order' => $order->get_id() ) ), 'woocommerce-order_again' ),
            'name' => __( 'שנה בחירה', 'woocommerce' )
        );
    }
    return $actions;
}
  
// ----------------
// 3. Detect Edit Order Action and Store in Session
  
add_action( 'woocommerce_cart_loaded_from_session', 'bbloomer_detect_edit_order' );
             
function bbloomer_detect_edit_order( $cart ) {
    if ( isset( $_GET['edit_order'], $_GET['_wpnonce'] ) && is_user_logged_in() && wp_verify_nonce( wp_unslash( $_GET['_wpnonce'] ), 'woocommerce-order_again' ) ) WC()->session->set( 'edit_order', absint( $_GET['edit_order'] ) );
}
  
// ----------------
// 4. Display Cart Notice re: Edited Order
  
add_action( 'woocommerce_before_cart', 'bbloomer_show_me_session' );
  
function bbloomer_show_me_session() {
    if ( ! is_cart() ) return;
    $edited = WC()->session->get('edit_order');
    if ( ! empty( $edited ) ) {
        $order = new WC_Order( $edited );
        $credit = $order->get_total();
        wc_print_notice( 'A credit of ' . wc_price($credit) . ' has been applied to this new order. Feel free to add products to it or change other details such as delivery date.', 'notice' );
    }
}
  
// ----------------
// 5. Calculate New Total if Edited Order
   
add_action( 'woocommerce_cart_calculate_fees', 'bbloomer_use_edit_order_total', 20, 1 );
   
function bbloomer_use_edit_order_total( $cart ) {
    
  if ( is_admin() && ! defined( 'DOING_AJAX' ) ) return;
     
  $edited = WC()->session->get('edit_order');
  if ( ! empty( $edited ) ) {
      $order = new WC_Order( $edited );
      $credit = -1 * $order->get_total();
      $cart->add_fee( 'Credit', $credit );
  }
    
}
  
// ----------------
// 6. Save Order Action if New Order is Placed
  
add_action( 'woocommerce_checkout_update_order_meta', 'bbloomer_save_edit_order' );
   
function bbloomer_save_edit_order( $order_id ) {
    $edited = WC()->session->get( 'edit_order' );
    if ( ! empty( $edited ) ) {
        // update this new order
        update_post_meta( $order_id, '_edit_order', $edited );
        $neworder = new WC_Order( $order_id );
        $oldorder_edit = get_edit_post_link( $edited );
        $neworder->add_order_note( 'Order placed after editing. Old order number: <a href="' . $oldorder_edit . '">' . $edited . '</a>' );
        // cancel previous order
        $oldorder = new WC_Order( $edited );
        $neworder_edit = get_edit_post_link( $order_id );
        $oldorder->update_status( 'cancelled', 'Order cancelled after editing. New order number: <a href="' . $neworder_edit . '">' . $order_id . '</a> -' );
        WC()->session->set( 'edit_order', null );
    }
}

我想在我的网站标题上做一个按钮，在用户点击"编辑订单"后删除会话，如果他决定取消编辑并保留他的原始订单，那么执行此操作的行是

WC()->session->set( 'edit_order', null );

我希望它能成为