Passing custom attribute of product using sessions woocommerce

Question

I am trying to get a custom attribute of a product 'advance-payment' and 'post_title' to another page using session. post_title gets passed but the custom attribute advance-payment does not. advance-payment is printed on simple.php but not on custom_form.php.

simple.php

<?php
session_start();
$_SESSION['post_title_form'] = $product->post->post_title;
$ca_advance_value = $product->get_attribute('advance-payment');
$_SESSION['post_advance_form']=$ca_advance_value;
//attribute is echoed here
echo "Test " . $ca_advance_value;

custom_form.php

<?php
session_start();
/* Template Name: CustomFormPage */ 
//is displayed
echo "TEST 1: " .$_SESSION['post_title_form'];
//not displayed
echo "TEST 2: ".$_SESSION['post_advance_form'];

Answer 1

You can add custom detail to woo commerce session by below hook:

add_filter( 'woocommerce_add_cart_item_data', 'add_cart_item_custom_data_vase', 10, 2 );
    function add_cart_item_custom_data_vase( $cart_item_meta, $product_id ) {
        global $woocommerce;            
        $cart_item_meta['post_title'] = 'post title';
        $cart_item_meta['post_advance_form'] = 'Advance Payment';
        return $cart_item_meta; 
    }

by below code you can get cart item from cart session on your custom_form.php:

global $woocommerce;
    $items = $woocommerce->cart->get_cart();
    foreach($items as $item => $values) {           
        $post_title = $values['post_title'];
        $post_advance_form = $values['post_advance_form'];
    }