尝试生成 PDF 时出现奇怪的错误消息

Question

我正在尝试使用 PHPExcel 库生成 PDF 文件。

我正在使用示例文件，到目前为止我只更改了库的路径。

这是我的代码：

<?php

/** Error reporting */
error_reporting(E_ALL);
ini_set('display_errors', TRUE);
ini_set('display_startup_errors', TRUE);
date_default_timezone_set('Europe/London');

if (PHP_SAPI == 'cli')
    die('This example should only be run from a Web Browser');

/** Include PHPExcel */
require_once '../excelHelper/PHPExcel.php';


//  Change these values to select the Rendering library that you wish to use
//      and its directory location on your server
$rendererName = PHPExcel_Settings::PDF_RENDERER_TCPDF;
//$rendererName = PHPExcel_Settings::PDF_RENDERER_MPDF;
//$rendererName = PHPExcel_Settings::PDF_RENDERER_DOMPDF;
//$rendererLibrary = 'tcPDF5.9';
$rendererLibrary = 'tcPDF.php';
//$rendererLibrary = 'DomPDF.php';
$rendererLibraryPath = '../excelHelper/PHPExcel/Writer/PDF/' . $rendererLibrary;


// Create new PHPExcel object
$objPHPExcel = new PHPExcel();

// Set document properties
$objPHPExcel->getProperties()->setCreator("Maarten Balliauw")
                             ->setLastModifiedBy("Maarten Balliauw")
                             ->setTitle("PDF Test Document")
                             ->setSubject("PDF Test Document")
                             ->setDescription("Test document for PDF, generated using PHP classes.")
                             ->setKeywords("pdf php")
                             ->setCategory("Test result file");


// Add some data
$objPHPExcel->setActiveSheetIndex(0)
            ->setCellValue('A1', 'Hello')
            ->setCellValue('B2', 'world!')
            ->setCellValue('C1', 'Hello')
            ->setCellValue('D2', 'world!');

// Miscellaneous glyphs, UTF-8
$objPHPExcel->setActiveSheetIndex(0)
            ->setCellValue('A4', 'Miscellaneous glyphs')
            ->setCellValue('A5', 'éàèùâêîôûëïüÿäöüç');

// Rename worksheet
$objPHPExcel->getActiveSheet()->setTitle('Simple');
$objPHPExcel->getActiveSheet()->setShowGridLines(false);

// Set active sheet index to the first sheet, so Excel opens this as the first sheet
$objPHPExcel->setActiveSheetIndex(0);


if (!PHPExcel_Settings::setPdfRenderer(
        $rendererName,
        $rendererLibraryPath
    )) {
    die(
        'NOTICE: Please set the $rendererName and $rendererLibraryPath values' .
        '<br />' .
        'at the top of this script as appropriate for your directory structure'
    );
}


// Redirect output to a client’s web browser (PDF)
header('Content-Type: application/pdf');
header('Content-Disposition: attachment;filename="01simple.pdf"');
header('Cache-Control: max-age=0');

$objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'PDF');
$objWriter->save('php://output');
exit;

但是它抛出了一个可怕的错误。在过去的一个小时里，我试图修复它，但没有任何运气。这是：

[21-Dec-2015 14:47:02 Europe/London] PHP Fatal error:  Uncaught exception 'PHPExcel_Writer_Exception' with message 'Unable to load PDF Rendering library' in /home/notiogrg/public_html/dev/excelHelper/PHPExcel/Writer/PDF/tcPDF.php:35
Stack trace:
#0 /home/notiogrg/public_html/dev/excelHelper/PHPExcel/Autoloader.php(82): require()
#1 [internal function]: PHPExcel_Autoloader::Load('PHPExcel_Writer...')
#2 /home/notiogrg/public_html/dev/excelHelper/PHPExcel/Writer/PDF.php(70): spl_autoload_call('PHPExcel_Writer...')
#3 /home/notiogrg/public_html/dev/excelHelper/PHPExcel/IOFactory.php(141): PHPExcel_Writer_PDF->__construct(Object(PHPExcel))
#4 /home/notiogrg/public_html/dev/approvalRequest/generatePDF.php(102): PHPExcel_IOFactory::createWriter(Object(PHPExcel), 'PDF')
#5 {main}
  thrown in /home/notiogrg/public_html/dev/excelHelper/PHPExcel/Writer/PDF/tcPDF.php on line 35

你能给我一个线索吗？我确定我在导入或 $rendererLibrary 变量上搞砸了，但我真的找不到解决方案。

Answer 1

https://github.com/PHPOffice/PHPExcel/blob/develop/Documentation/markdown/Overview/10-Reading-and-Writing.md#pdf

您需要先安装 tcPDF，它没有与 PHPExcel 捆绑在一起。然后你需要正确配置PHPExcel，也许你还需要配置tcPDF。

Answer 2

阅读 PHPExcel documentation 应该是您在这里提问之前的第一选择。

PDF

PHPExcel allows you to write a spreadsheet into PDF format, for fast distribution of represented data.

PDF limitations Please note that PDF file format has some limits regarding to styling cells, number formatting, ...

PHPExcel_Writer_PDF

PHPExcel’s PDF Writer is a wrapper for a 3rd-Party PDF Rendering library such as tcPDF, mPDF or DomPDF. Prior to version 1.7.8 of PHPExcel, the tcPDF library was bundled with PHPExcel; but from version 1.7.8 this was removed. Instead, you must now install a PDF Rendering library yourself; but PHPExcel will work with a number of different libraries.

Currently, the following libraries are supported:

|---------|---------|-----------------------------------------|----------------------------| | | Version | | | | Library | tested | Downloadable from | PHPExcel Internal Constant | |---------|---------|-----------------------------------------|----------------------------| | tcPDF | 5.9 | http://www.tcpdf.org/ | PDF_RENDERER_TCPDF | | mPDF | 5.4 | http://www.mpdf1.com/mpdf/ | PDF_RENDERER_MPDF | | domPDF | 0.6.0 | beta 3 http://code.google.com/p/dompdf/ | PDF_RENDERER_DOMPDF | |---------|---------|-----------------------------------------|----------------------------|

The different libraries have different strengths and weaknesses. Some generate better formatted output than others, some are faster or use less memory than others, while some generate smaller .pdf files. It is the developers choice which one they wish to use, appropriate to their own circumstances.

Before instantiating a Writer to generate PDF output, you will need to indicate which Rendering library you are using, and where it is located.

$rendererName = PHPExcel_Settings::PDF_RENDERER_MPDF;
$rendererLibrary = 'mPDF5.4';
$rendererLibraryPath = dirname(__FILE__).'/../../../libraries/PDF/' . $rendererLibrary;

if (!PHPExcel_Settings::setPdfRenderer(
    $rendererName,
    $rendererLibraryPath
    )) {
    die(
        'Please set the $rendererName and $rendererLibraryPath values' .
        PHP_EOL .
        ' as appropriate for your directory structure'
    );
}

您没有将 $rendererLibraryPath 设置为指向您安装的任何 PDF 渲染库的 PHPExcel 包装器（PHPExcel 已经知道）；您将其设置为指向您安装 tcPdf 的文件夹（或您正在使用的任何库）。

尝试生成 PDF 时出现奇怪的错误消息

Strange error message when trying to generate a PDF

php

phpexcel

PDF

PHPExcel_Writer_PDF