turn on/off the shippment base on product weight? Need PHP Help

Hi All, some my products are heavy, the othes is light
i have the pre item and mzmt shipping modules
when the product's weight above 70lbs i want only show the pre item shipping module in checkout_shipping page, when the product's weight bellow 70lbs i want only show mzmt moduls.
in the mzmt.php i have add the following code ,but is can not work.
if ($products_weight = $product['products_weight'] < 70) {
$this->enabled = ((MODULE_SHIPPING_MZMT_STATUS == 'False') ? true : false);
} else {
$this->enabled = ture;
}

or

  if ($order->info['products_weight'] < 70) {

$this->enabled = ((MODULE_SHIPPING_MZMT_STATUS == 'False') ? true : false);
} else
$this->enabled =false;

You could use:

      // disable only when entire cart is free shipping
      if (zen_get_shipping_enabled($this->code)) {
        // not for over 70
        if (IS_ADMIN_FLAG || $shipping_weight < 70) {
          $this->enabled = ((MODULE_SHIPPING_ITEM_STATUS == 'True') ? true : false);
        }
      }

Don't forget to global $shipping_weight so that it is available to you ...

I'm trying to turn on/off the shipment module based on price - the code below worked in ZC 1.37 just fine (by hiding the module). In this example, the module should not appear if the order is over $100.

global $order;

if ($order->info['subtotal'] > 100)
  $this->enabled = false;

Unfortunately, in ZC 1.38, it doesn't work anymore. Is there another command (not $this->enabled = false) that can be used to disable or hide the shipping module? Or perhaps the command works, but only once per session, so it can't be enabled or disabled "on the fly" in ZC 1.38?

Any ideas?

Can you use:
$order->info['total']

the subtotal is 0 at that point so you are not obtaining a value ...

Both $order->info['total'] and $order->info['subtotal'] have values and can be used in the "if" statement, the problem is that > $this->enabled = false; command is ignored by the shipping module.

echo both values just above where you have the IF ...

Well, in my case, echo of "Subtotal" outputs the price of the product(s), while "Total" outputs the sum of products, taxes and other surcharges (if any) - so this is OK, you can use either value depending on your needs.

I found out what the problem was: I was putting the custom "if" statement BEFORE the "zen_get_shipping_enabled" code, so the "if" statement (when true) would disable the module, but "zen_get_shipping_enabled" would just re-enable it - that's why it wasn't working.

WRONG code:

global $order;

if ($order->info['subtotal'] > 100)
  $this->enabled = false;

// disable only when entire cart is free shipping
if (zen_get_shipping_enabled($this->code))
  $this->enabled = ((MODULE_SHIPPING_ZONES_STATUS == 'True') ? true : false);

Perhaps I was mislead by "// disable only when..." so I didn't realize that the 2 lines of code below it actually ENABLE the shipping module. Once I put the custom "if" statement AFTER "zen_get_shipping_enabled", it started working just fine.

Working code:

// disable only when entire cart is free shipping
if (zen_get_shipping_enabled($this->code))
  $this->enabled = ((MODULE_SHIPPING_ZONES_STATUS == 'True') ? true : false);

global $order;

if ($order->info['subtotal'] > 100)
  $this->enabled = false;

Thanks for your help! The issue is now resolved.

Be aware that this will only work when the customer is logged in and that the Shipping Estimator will not work as there isn't an Order to build from until the customer logs in ...