<?

// converte strings de um texto no formato desejado
function change_str($text, $str)
{
	$str2 = strtoupper($str);
	
	//string mai�scula
	$str = strtoupper($str);
	
	$str2 = "<span style=\"background-color: FFFF00\">".$str2."</span>";
		
	$text = str_replace($str, $str2, $text);
	
	//string min�scula
	$str = strtolower($str);
	
	$str2 = "<span style=\"background-color: FFFF00\">".$str2."</span>";
		
	$text = str_replace($str, $str2, $text);
	
	//string com o primeiro caracter mai�sculo
	$str = ucfirst($str);
	
	
	$str2 = "<span style=\"background-color: FFFF00\">".$str2."</span>";
		
	$text = str_replace($str, $str2, $text);
	
	return $text;
}
?>