__construct([string orientation [, string unit [, mixed size]]])
orientation
P
o Portrait
(normal)
L
o Landscape
(apaisado)
P
.
unit
pt
: punto
mm
: milimetro
cm
: centimetro
in
: pulgada
mm
.
size
A3
A4
A5
Letter
Legal
unit
).
A4
.
$pdf = new FPDF('P','mm',array(100,150));