Need help with a function not completing

[JCScoobyRS]

I have a function that follows this premise:

Explode string into lines by exploding based on /n.
I then exploded the line by " " to get words.

This is where I run into a problem. I have this:

$lineWords = explode(" ", $currLine);

            //Loop through each word
            for($cntWord=0; $cntWord<Count($lineWords); $cntWord++){
                //Process each word
                if (array_key_exists($lineWords[$cntWord],$KWarray)){
                    $lineWords[$cntWord] = '<span style="'.$KWColor[$KWarray[$lineWords[$cntWord]]].'">'.$lineWords[$cntWord].'</span>';
                }
            }

            //Reassemble the line
            $currLine = implode(" ",$lineWords);

What happens is if $cntWord is the last, or only, element in the array, it's not getting colorized. Can anyone see why that would happen? Thanks, Jeremy