How can I run a PHP explode() function when parsing a variable in Stacey?

How can I run a PHP explode开发者_JAVA百科() function on a variable called "artist" in Stacey?

I've been digging around in /app/asset-types/page.inc.php around line 49 "#magic variable assignment", but I don't have enough PHP experience to understand what's going on.

Thanks!