function woocommerce_template_loop_add_to_cart(){return wc_whatsapp_button();}
function woocommerce_template_single_add_to_cart(){return wc_whatsapp_button();}
function wc_whatsapp_button() {
global $product;
$button_text = 'WhatsApp ile Satın Al';
$phone = '+905555555555';
$product_title = $product->get_title();
$product_link = get_permalink($product->get_id());
$text = urlencode("Bu ürün için yazıyorum: $product_title - $product_link");

echo '<div style="text-align: center; margin-top: 10px;">
<a target="_blank" href="https://wa.me/'.$phone.'?text='.$text.'"
style="display: inline-block; padding: 12px 20px; color: white; text-decoration: none; font-weight: bold;
background-color: green; border-radius: 5px; border: none; box-shadow: none; text-align: center;">
WhatsApp ile Satın Al
</a>
</div>';
}