Using strotupper() not working?

[localhost]

I was hoping someone could help me out with this, it is pretty self-explanatory.

[code]
$sentence = "i wanna make the beginning letter capital only.";

// $words is now an array
$words = explode(" ", $sentence);

foreach ($words as $word)
{
$word = strtoupper(substr($word, 1, 1));
echo $word;
}
[/code]

This outputs:
AAHEEAN

Thanks for any help you can give.

[extrovertive]

ucfirst

[localhost]

Pardon?

[Barand]

It's a php function

http://www.php.net/ucfirst