Snippet PHP + CSS: HTML Maiuscoletto

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/**
 *
 * (c)2011 SFS.it, All rights reserved
 * License: http://www.sfs.it/licenza-bsd44.html
 * Use and modify all you want just keep this comment. Thanks
 *
 **/
 
/**
 *
 * function html_capitalize
 * parameters:
 *    $text: testo da convertire
 *
 **/
function html_capitalize($text) {
	$substr='';
	$return='';
	for ($c=0,$len=strlen($text); $c < $len; $c++) {
		$ch = $text[$c];
		if ($ch >= 'a' && $ch <= 'z')
			$substr.=$ch;
		else {
			if (!empty($substr)){
				$return.='<span class="smaller">'.strtoupper($substr).'</span>';
				$substr='';
			}
			$return.=$ch;
		}
	}
	if (!empty($substr))
		$return.='<span class="smaller">'.strtoupper($substr).'</span>';
	return $return;
}