Parse multiselect custom options array

[d_fittipaldi]

I'm building a book shop store.

I created an Author custom attribute (multiselect) and I'd like to render it as a link to advanced search.

The following code works if I select only one value, but if I select more of one value I see array.

<a href="/catalogsearch/advanced/result/?author=<?php echo $_product->getData('author') ?>"><?php echo $_product->getAttributeText('author') ?></a>

 How can I adapt it for multiselect values?

[theMageComp · Accepted solution]

@d_fittipaldi

This may be help you, If you make the array of selected value into one string and then pass in URL.