<?php
require('fpdf/mbfpdf.php');

$pdf=new MBFPDF('L', 'mm', 'A4');
$pdf->AddMBFont(GOTHIC ,'SJIS');
$pdf->Open();
$pdf->AddPage();
$pdf->SetFont(GOTHIC,'',20);
$pdf->Write(10,"サンプル文字列");
$pdf->Output();
?>