PHP: Capitalize imported text

In a php script I have the following command:

$data['city'] = htmlspecialchars((string)$row->{get($row, 'CPVILLE')}->CPVILLE, ENT_QUOTES, 'UTF-8');

It imports from a XML file a text to a mysql database.

There is no problem, except that the source text is in uppercase. I need it capitalized in order to respect the right format for the website.

How could I edit this command to transform the text as capitalized?