[PHP] What did I do wrong to cause a parse error?

[Phil Powell]

foreach ($profileArray[$i][attributes] as $key => $val) {
     $singleProfileHTML .= $key . "=\"" . str_replace("'", ''', str_replace('"', 
'"', $val)) . "\"\n";
    }

The parsing error occurs in the "$singleProfileHTML.." line.  I'm completely don't get 
it; I see absolutely nothing wrong with this, what did I miss?

Phil