$this->getValuesHtml()
is inherited from app/code/core/Mage/Catalog/Block/Product/View/Options/Type/Select.php
.
Note: In many cases the template path is a hint to the relevant block path already (if you take a look after design/frontend/theme/theme/template
what remains is catalog/product/view/options/type/select
which is basically the Catalog
module in app/code/core
and since you're looking for a Block
the rest is quite easy to follow based on the template path again). This however is not always the case and is just meant to be a quick hint for all the lazy ones out there ;).
For getting a better idea what block is underlying your template please enable the block name hints from backend.
You can find them at System > Configuration > ADVANCED > Developer
- now change to your desired website or store view in the upper left scope drop down - and then enable Template Path Hints
(which gives you the path to the template file [mandatory for the next option to take effect]) and Add Block Names to Hints
(which gives you the relevant block class for the same).
Often Magento core developers even left comments in the template files specifying what $this is. This comment is present in select.phtml
as well:
<?php /* @var $this Mage_Catalog_Block_Product_View_Options_Type_Select */ ?>
Also, the relevant layout xml can give you an idea about what template and block files are related to each other, but that might go to far now - still for the record, catalog.xml
is stating an action, inheriting the relevant block and template file:
<action method="addOptionRenderer"><type>select</type><block>catalog/product_view_options_type_select</block><template>catalog/product/view/options/type/select.phtml</template></action>
So in your case all these would give you Mage_Catalog_Block_Product_View_Options_Type_Select
or in other words as a file path. app/code/core/Mage/Catalog/Block/Product/View/Options/Type/Select.php
I assume you're aware about it already but one common, additional note is to be made here again: as always, do NOT modify this file directly.
Either create a copy under app/code/local/Mage/Catalog/Block/Product/View/Options/Type/Select.php
or, even better, create your own custom module and rewrite the block from there to be even more future-proof.