无法在 firefox 和 safari 浏览器中设置会话变量

我正在使用 Ajax 设置会话变量，它在 chrome 中运行良好，但在 safari 和 Firefox 浏览器中不起作用

I am setting the session variable using Ajax, its working fine in chrome but not working in safari and Firefox browser

这是我的 Ajax 方法:

This is my Ajax method:

add_action('wp_ajax_wdm_add_user_custom_data_options', 'wdm_add_user_custom_data_options_callback');
add_action('wp_ajax_nopriv_wdm_add_user_custom_data_options', 'wdm_add_user_custom_data_options_callback');
function wdm_add_user_custom_data_options_callback()
{
    //Custom data - Sent Via AJAX post method
    $product_id = $_POST['custom_data_4']; 
    $custom_data_1 = $_POST['custom_data_1']; 
    $custom_data_2 = $_POST['custom_data_2'];
    $custom_data_3 = $_POST['custom_data_3'];


    $_SESSION['product_idd'] = $product_id;
    $_SESSION['custom_data_1'] = $custom_data_1;
    $_SESSION['product_pos'] = $custom_data_2;
    $_SESSION['product_lmm'] = $custom_data_3;
       die();
}

当我尝试在上面的 Ajax 方法中打印 $_SESSION 和 $_POST 值时，它对所有浏览器都可以正常工作，但是当我尝试在下面的函数中分配上面的会话变量时:-

When I am trying to print the $_SESSION and $_POST value inside above Ajax method its working fine for all browser but when I try to assign above session variable in below function:-

function kia_add_cart_item_data( $cart_item, $product_id ){

   if(isset($_SESSION['product_pos']) && $_SESSION['product_idd']==$cart_item['product_id']){
            $posnumber=$_SESSION['product_pos'];
        }else{
            $posnumber=1;
        }
        if(isset($_SESSION['product_lmm']) && $_SESSION['product_idd']==$cart_item['product_id']){
            $lmmnumber=$_SESSION['product_lmm'];
        }else{
            $lmmnumber=1;
        }

        $array['product_id'] = $product_id;


        $cart_item['product_pos'] = $posnumber;
        $cart_item['product_lmm'] = $lmmnumber;
    return $cart_item;

}

然后我在 Firefox 和 safari 浏览器的情况下获得其他部分价值，而它在 chrome 中运行良好.

Then I am getting else part value in case of Firefox and safari browser while it's working fine in chrome.

请帮助我为什么我没有在 Firefox 和 safari 中获得会话值.

Please help me why I am not getting the session value in Firefox and safari.