Magento in the product page showing the SKU defined in Custom option

Problem background:

Now the sale of a book, with the English and Spanish version, requires the customer to choose their own language version. Therefore, to define the product, define its Custom option option, add the appropriate version of the entry.

The foreground will show

It is required that the SKU be displayed under each entry.

Solution:

1. Find app\code\local\mage\catalog\block\product\view\options\type\select.php

2. Add an Output SKU statement to the statement in line 103 of the file

$selectHtml. = ' <li> '.
                               <input type= "'. $type. '" class= "". $class. '. $require. ' product-custom-option ' onclick= ' opconfig.reloadprice () ' Name= ' options['. $_option->getid (). $arraySign. ' id= ' Options_ '. $_option->getid (). _ '. $count. ' value= '. $_value->getoptiontypeid (). '/> '. '
                               <span class= "label" ><label for= "Options_". $_option->getid (). _ '. $count. ' " > '. $_value->gettitle (). ' '. $priceStr. ' </label><br><label> '. $_value->getsku (). ' </label></span> ';