SetFont(string family [, string style [, float size]])
define('FPDF_FONTPATH','/home/www/font');
require('fpdf.php');
family
style
size
// Times normal 12
$pdf->SetFont('Times');
// Arial negreta 14
$pdf->SetFont('Arial','B',14);
// Suprimeix negreta
$pdf->SetFont('');
// Times negreta, cursiva i subratllada 14
$pdf->SetFont('Times','BIU');