FPDF水印不会出现

Question

我有这个示例代码：

<?php
    session_start();
    define('FPDF_FONTPATH', 'font/');
    require('fpdf/rotation.php');

    class PDF extends PDF_Rotate
    {
        function Header()
        {
            //Put the watermark
            $this->SetFont('Arial','B',50);
            $this->SetTextColor(255,192,203);
            $this->RotatedText(35,190,'Preview Only!',45);
        }

        function RotatedText($x, $y, $txt, $angle)
        {
            //Text rotated around its origin
            $this->Rotate($angle,$x,$y);
            $this->Text($x,$y,$txt);
            $this->Rotate(0);
        }
    }

    $pdf = new FPDF();
    $pdf->AddPage();
    $pdf->SetFont('Arial','B',12);
    $pdf->Cell(40,10,'Sample line');
    $pdf->Output();
?>

它显示PDF文件，但不显示水印。我究竟做错了什么？请帮我。感谢。

Answer 1

我只需要将$pdf = new FPDF();更改为$pdf = new PDF();