使用 FPDF + WriteHTML 附加组件除以零错误

Question

我正在尝试使用 FPDF 生成 PDF 文件，这是我第一次尝试。

我有最新的 FPDF 文件并且还设置了 WriteHTML 插件。下面的代码一直在运行，直到最底部的 WriteHTML 部分。我收到错误“警告：第 796 行 /home4/fwall/public_html/fpdf/fpdf.php 中除以零”。当我查看 FPDF.php 的第 796 行时，我发现：

// Output text in flowing mode
    $cw = &$this->CurrentFont['cw'];
    $w = $this->w-$this->rMargin-$this->x;
    $wmax = ($w-2*$this->cMargin)*1000/$this->FontSize; // <--LINE 796
    $s = str_replace("\r",'',$txt);
    $nb = strlen($s);
    $sep = -1;
    $i = 0;
    $j = 0;
    $l = 0;
    $nl = 1;

如果我添加一个条件语句，大致如下：

if ($this->FontSize != 0) {
$wmax = ($w-2*$this->cMargin)*1000/$this->FontSize; // <--LINE 796
}

我可以让错误消失，但我知道这不可能是正确的。有人在我的代码中看到会导致这种情况的错误吗？

require ('/home4/fwall/public_html/fpdf/fpdf.php'); 

//create a FPDF object
$pdf=new FPDF();
$pdfhtml=new PDF_HTML();

//set document properties
$pdf->SetAuthor('Author Name');
$pdf->SetTitle('PRESS RELEASE - NAME OF SHOW');

//set font for the entire document
$pdf->SetFont('Helvetica','B',10);
$pdf->SetTextColor(0,0,0);

//set up a page
$pdf->AddPage('P');
$pdf->SetDisplayMode(real,'default');

//display the top block
$contact = 'Contact Name';
$addline1 = '4002 2nd Ave NE, #2';
$addline2 = 'Address Line 2';
$cityzip = 'Seattle, WA 98105';
$pdf->Cell(0, 4, 'PRESS RELEASE', 0, 0, 'L');
$pdf->Cell(0, 4, 'FOR IMMEDIATE RELEASE', 0, 1, 'R');
$pdf->Cell(0, 4, 'CONTACT: '.$contact, 0, 0, 'L');
$pdf->Cell(0, 4, 'KILL DATE: August 1, 2014', 0, 1, 'R');
$pdf->Cell(0, 4, $addline1, 0, 1, 'L');
$pdf->Cell(0, 4, $addline2, 0, 1, 'L');
$pdf->Cell(0, 4, $cityzip, 0, 1, 'L');


//display the title
$pdf->SetFontSize(20);
$pdf->Cell(0,10,'PRESS RELEASE TITLE',0,1,'C',0);

//display the sub-title
$pdf->SetFontSize(16);
$pdf->Cell(0,10,'The Subtitle',0,1,'C',0);

//display the italic summary
$pdf->SetXY(10,55);
$pdf->SetFont('Helvetica','I',10);
$summary = 'SEATTLE - Theatre Off Jackson presents SPF 8, the annual exhibition of solo performance. Featuring four featured performers and one shorts night, the festival will occur between February 6th and March 1st, 2014. This year\'s festival is an exciting mix of experienced artists and new-comers with exciting stories to tell. From tales of a ten-day vows of silence to what it\'s like growing up with deaf parents and siblings, this year\'s festival is a potpourri of styles and stories.';
$pdf->MultiCell(0, 4, $summary , 0, 'J');

//display the main content
$pdf->SetFont('Helvetica','',10);
$maincontent = '
    First line.
    Second Line?
    <ul>
        <li>
        Item 1
        </li>
    </ul>
    ';
$pdfhtml->WriteHTML($maincontent);


//Output the document
$pdf->Output('example1.pdf','I');

Answer 1

WriteHTML add-on 是一个名为PDF_HTML 的类，它扩展了原来的FPDF。要使用附加功能，您必须实例化子类并使用它：

$pdfhtml=new PDF_HTML();

您不需要父类的附加实例 ($pdf)。删除它并将$pdf 的所有引用更改为$pdfhtml，您就可以开始了：

<?php
define('FPDF_FONTPATH', '../Classes/FPDF/font/');
require ('../Classes/FPDF/fpdf.php');
require ('writeHtml.php');


//create a PDF_HTML object
$pdfhtml=new PDF_HTML();

//set document properties
$pdfhtml->SetAuthor('Author Name');
$pdfhtml->SetTitle('PRESS RELEASE - NAME OF SHOW');

//set font for the entire document
$pdfhtml->SetFont('Helvetica','B',10);
$pdfhtml->SetTextColor(0,0,0);

//set up a page
$pdfhtml->AddPage('P');
// $pdfhtml->SetDisplayMode(real,'default'); //<-- commented this line, what is real?

//display the top block
$contact = 'Contact Name';
$addline1 = '4002 2nd Ave NE, #2';
$addline2 = 'Address Line 2';
$cityzip = 'Seattle, WA 98105';
$pdfhtml->Cell(0, 4, 'PRESS RELEASE', 0, 0, 'L');
$pdfhtml->Cell(0, 4, 'FOR IMMEDIATE RELEASE', 0, 1, 'R');
$pdfhtml->Cell(0, 4, 'CONTACT: '.$contact, 0, 0, 'L');
$pdfhtml->Cell(0, 4, 'KILL DATE: August 1, 2014', 0, 1, 'R');
$pdfhtml->Cell(0, 4, $addline1, 0, 1, 'L');
$pdfhtml->Cell(0, 4, $addline2, 0, 1, 'L');
$pdfhtml->Cell(0, 4, $cityzip, 0, 1, 'L');


//display the title
$pdfhtml->SetFontSize(20);
$pdfhtml->Cell(0,10,'PRESS RELEASE TITLE',0,1,'C',0);

//display the sub-title
$pdfhtml->SetFontSize(16);
$pdfhtml->Cell(0,10,'The Subtitle',0,1,'C',0);

//display the italic summary
$pdfhtml->SetXY(10,55);
$pdfhtml->SetFont('Helvetica','I',10);
$summary = 'SEATTLE - Theatre Off Jackson presents SPF 8, the annual exhibition of solo    performance. Featuring four featured performers and one shorts night, the festival will occur between February 6th and March 1st, 2014. This year\'s festival is an exciting mix of experienced artists and new-comers with exciting stories to tell. From tales of a ten-day vows of silence to what it\'s like growing up with deaf parents and siblings, this year\'s festival is a potpourri of styles and stories.';
$pdfhtml->MultiCell(0, 4, $summary , 0, 'J');

//display the main content
$pdfhtml->SetFont('Helvetica','',10);

$maincontent = '
    First line.
    Second Line?
    <ul>
        <li>
        Item 1
        </li>
    </ul>
    ';
$pdfhtml->WriteHTML($maincontent);


//Output the document
$pdfhtml->Output('example1.pdf','I');

请注意，我更改了顶部的包含路径。我还评论了你打电话给SetDisplayMode 的那一行。

Answer 2

您的 pdf html 中可能有一些元素，例如不平衡。某些元素可能尚未关闭或启动。 我花了 2 天时间才找到这个问题。