Display a link if SKU exists

Question

1. I'm trying to add a link to an order confirmation email.
2. The link should only display if SKU 2133 exists.
3. The problem when SKU 2133 exists it displays SKU 2133 does not exist.

Before adding the link, I'm testing with the code below. In default.phtml, I added the code below -

           <?php
            $sku = '2133';
            $id = Mage::getModel('catalog/product')->getIdBySku($sku);
            if ($id){
                echo "SKU {$sku} exists";
            }
            else{
                echo "SKU {$sku} does not exist";
            }
            ?>

Answer 1

Your test:

$sku       = '2133';
$catalog   = Mage::getModel('catalog/product');
$productId = $catalog->getIdBySku($sku);
$product   = Mage::getModel('catalog/product')->load($productId);

if ($product->getId()) {
    echo "Yes";
} else {
    echo "No";
}

Your file:

You have to get your current product Id then check if the SKU is aqual to 2133

$productId = "10";
$product   = Mage::getModel('catalog/product')->load($productId);
if ($product->getSku() == "2133") {
    echo "Yes";
} else {
    echo "No";
}