Page redirect with product id

[rkrajeshkannanmca]

i want to page redirect given url(send a product id with url) when click add to cart button in content-single-product

i can’t redirect with product id,this is a sample code for i testing

 function my_custom_add_to_cart_redirect( $url ,$pid) {
    
 $pid =  $_POST['product_id'];
 
   $url1 = get_permalink( 453 );
 
 $url=$url1."&p_id=".$pid; 
 return $url;
}