php spintax script

Hi,
I am looking for a php script for parsing out spintax. Or at least directions on where I should start for making my own.

Thanks,
Michael

 

Something like this: http://ronaldarichardson.com/2011/09/23/recursive-php-spintax-class-3-0/

 

function spin($var){
$spun = "";

$words = explode("{",$var);
foreach ($words as $word)
{
$words = explode("}",$word);
foreach ($words as $word)
{
$words = explode("|",$word);
$word = $words[array_rand($words, 1)];
$spun .= $word." ";
}
}

return $spun;
}

USAGE:

echo spin("This is {my|your|yours|the} text that came after being spun!");