首先，如果重复此行，则应在按钮上使用一个类，而不要使用id，因为重复的id属性无效.

Firstly, if this row is repeated you should use a class on the button, not an id, as duplicate id properties are invalid.

<tr id="product-id-<?=$product->product->id;?>">            
    <td><span class="product_price_show"></span></td>
    <td><span><?=  $product->product_qty; ?></span></td>
    <td><span><?= $product->product->stock->qty; ?></span></td>
    <td><span><?=  $product->total_price_tax_incl; ?></span></td>
    <td>
        <a class="quick-update-order-product">Update</a>                
    </td>            
</tr>

按钮上有课程后，您就可以使用closest()查找tr:

Once you've got the class on the button you can use closest() to find the tr:

$('.quick-update-order-product').click(function() {
    var trId = $(this).closest('tr').prop('id');
});