tFPDF 生成一个空的 pdf 文件

我正在尝试使用 tFPDF 库在 PHP 中生成 PDF 文件。我从 FPDF 开始，除了 UTF-8 字符是乱码之外，它工作得很好。经过一番搜索，我发现可以实现 tFPDF 以在 PDF 文件中包含 UTF-8 字符。但我所有的尝试都导致了一个无法打开的空文件 - 0 KB 文件写入我的硬盘驱动器，并且当我双击它时出现“文件格式有问题”消息。这是我的代码。我在错误日志中没有收到任何 PHP 错误，因此很难判断出了什么问题。

protected function getPDFFileData($diagnosis_id)
{
    define('FPDF_FONTPATH', JPATH_COMPONENT.'/helpers/font/');
    require_once JPATH_COMPONENT.'/helpers/tfpdf.php';
    //require_once JPATH_COMPONENT.'/helpers/fpdf.php';

    $item = $this->getItem($diagnosis_id);

    $pdf = new tFPDF('P', 'mm', 'Letter');
    //$pdf = new FPDF('P', 'mm', 'Letter');
    $pdf->AddPage();

    $fontname = "dejavusans";
    $pdf->AddFont($fontname, '', 'DejaVuSans.ttf', true);
    $pdf->AddFont($fontname, 'B', 'DejaVuSans-Bold.ttf', true);
    $pdf->AddFont($fontname, 'I', 'DejaVuSans-Oblique.ttf', true);
    $pdf->SetFont($fontname, '', 10);

    /* $fontname = "helvetica";
    $pdf->AddFont($fontname, '', 'helvetica.php');
    $pdf->AddFont($fontname, 'B', 'helveticab.php');
    $pdf->AddFont($fontname, 'I', 'helveticai.php');
    $pdf->SetFont($fontname, '', 10); */

    $domain_header = "Domain".chr(160).($item->ordinal).".".chr(160).($item->domain_label);
    $pdf->Cell(90, 6, $domain_header, 0, 0, 'L');
    $class_header = "Class".chr(160).($item->domain_class_ordinal).".".chr(160).($item->class_label);
    $pdf->Cell(90, 6, $class_header, 0, 1, 'R');
    $pdf->Ln();
    $pdf->SetFont($fontname, '', 10);
    $domain_class_info = "Domain".chr(160).($item->ordinal).chr(160).chr(183).chr(160)."Class".chr(160).($item->domain_class_ordinal).chr(160).chr(183).chr(160)."Diagnosis Code".chr(160).($item->diagnosis_code);
    $pdf->Cell(40, 6, $domain_class_info);
    $pdf->Ln();
    $pdf->SetFont($fontname, '', 14);
    $pdf->Cell(40, 8, $item->diagnosis_label);
    $pdf->Ln();

    // More code that generates more text . . . 

    return $pdf->Output('S');
}

添加新字体需要两个步骤：

• 字体定义文件的生成
• 脚本中字体的声明

对于您的情况，我们需要生成字体定义文件。例如，我们可以使用命令行：

~/w/t/fpdf181> php makefont/makefont.php font/dejavu-sans/DejaVuSans.ttf cp1252
Font file compressed: DejaVuSans.z
Font definition file generated: DejaVuSans.php

Add font

$fontname = "DejaVuSans";
$pdf->AddFont($fontname, '', 'DejaVuSans.php', true);

http://www.fpdf.org/en/tutorial/tuto7.htm http://www.fpdf.org/en/tutorial/tuto7.htm

[EDIT]

根据您的评论，您使用了该库http://www.fpdf.org/en/script/script92.php http://www.fpdf.org/en/script/script92.php

1) Dejavu 已添加到tfpdf/font/unifont文件夹。而且，名字应该是

$fontname = 'DejaVu';

2）如果我们想添加自定义字体文件夹，我们需要覆盖_SYSTEM_TTFONTS

// Optionally define the filesystem path to your system fonts
// otherwise tFPDF will use [path to tFPDF]/font/unifont/ directory
// define("_SYSTEM_TTFONTS", "C:/Windows/Fonts/");

tfpdf/tfpdf.php

 if (defined("_SYSTEM_TTFONTS") && file_exists(_SYSTEM_TTFONTS.$file )) 
 {
    $ttffilename = _SYSTEM_TTFONTS . $file ;
 }
 else {
    $ttffilename = $this->_getfontpath().'unifont/'.$file ;
 }

我创建了一个示例测试：

<?php

// Optionally define the filesystem path to your system fonts
// otherwise tFPDF will use [path to tFPDF]/font/unifont/ directory

//define("_SYSTEM_TTFONTS", "font/dejavu-sans/");

require "tfpdf.php";

$pdf = new tFPDF('P', 'mm', 'Letter');
$pdf->AddPage();

//Example object data
/** @var StdClass $item */
$item = new StdClass();
$item->ordinal = 'Item Ordinal';
$item->domain_label = "Item Domain Label";
$item->domain_class_ordinal = "Item Domain Class Ordinal";
$item->class_label = 'Item Class Label';
$item->diagnosis_code = 'Item Diagnosis Code';
$item->diagnosis_label = 'Item Diagnosis Label';

// Add a Unicode font (uses UTF-8)
$fontname = 'DejaVu';
$pdf->AddFont($fontname,'','DejaVuSans.ttf',true);
$pdf->AddFont($fontname, 'I', 'DejaVuSans-Oblique.ttf', true);
$pdf->AddFont($fontname, 'B', 'DejaVuSans-Bold.ttf', true);
$pdf->SetFont('DejaVu','',14);

$domain_header = "Domain".chr(160).($item->ordinal).".".chr(160).($item->domain_label);
$pdf->Cell(90, 6, $domain_header, 0, 0, 'L');
$class_header = "Class".chr(160).($item->domain_class_ordinal).".".chr(160).($item->class_label);
$pdf->Cell(90, 6, $class_header, 0, 1, 'R');
$pdf->Ln(10);
$pdf->SetFont($fontname, '', 10);
$domain_class_info = "Domain".chr(160).($item->ordinal).chr(160).chr(183).chr(160)."Class".chr(160).($item->domain_class_ordinal).chr(160).chr(183).chr(160)."Diagnosis Code".chr(160).($item->diagnosis_code);
$pdf->Cell(40, 6, $domain_class_info);
$pdf->Ln(10);
$pdf->SetFont($fontname, '', 14);
$pdf->Cell(40, 8, $item->diagnosis_label);
$pdf->Ln(10);

$pdf->Output('S');