如何使用TCPDF将excel文件转换为pdf？

Question

我需要生成一个图表在excel到pdf的报告。我尝试使用phpexcel，但它无法加载图表。它只生成带有表格的PDF。这是我在phpexcel中的代码。

$newpdf = "report-".date('m_d_Y_H_i_s', strtotime('now')).".pdf";
$objPHPExcel1 = new PHPExcel();
$objPHPExcel1 = PHPExcel_IOFactory::load('csv/'.$filename);
$objPHPExcel1->getActiveSheet(0)->getPageSetup()->setOrientation(PHPExcel_Worksheet_PageSetup::ORIENTATION_PORTRAIT);
$objPHPExcel1->getActiveSheet(0)->getPageSetup()->setPaperSize(PHPExcel_Worksheet_PageSetup::PAPERSIZE_A4);
$objPHPExcel1->getActiveSheet(0)->getPageSetup()->setFitToWidth(true);
$objPHPExcel1->getActiveSheet(0)->getPageSetup()->setFitToHeight(true);
$objPHPExcel1->getActiveSheet()->setShowGridLines(false);

header('Content-Type: application/pdf');
header('Content-Disposition: attachment;filename="'.$newpdf.'"'); 
header('Cache-Control: max-age=0'); //no cache
$objWriter1 = new PHPExcel_Writer_PDF($objPHPExcel1); 
$objWriter1->save('php://output');
exit;

我还尝试使用jchartfx for graphs从HTML加载内容，但没有成功。有什么想法吗？

提前谢谢。

Answer 1

PHPExcel只能从Excel2007 (OfficeOpenXML .xlsx)文件中读取图表，并且只有在您显式指示它这样做时才会加载这些图表。

if (PHPExcel_IOFactory::identify('csv/'.$filename) == "Excel2007") {
    $objReader = PHPExcel_IOFactory::createReader("Excel2007");
    $objReader->setIncludeCharts(TRUE);
} else {
    die("Can't load charts");
}
$objPHPExcel = $objReader->load('csv/'.$filename);

在写入PDF文件时，您必须安装相关库(在本例中为tcpdf )，并告诉PHPExcel您要使用该库以及tcpdf的安装目录。

$rendererName = PHPExcel_Settings::PDF_RENDERER_TCPDF;
$rendererLibrary = 'tcPDF5.9';
$rendererLibraryPath = '/php/libraries/PDF/' . $rendererLibrary;

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

您还需要安装jpgraph，而且PHPExcel还需要知道它的安装位置。

$rendererName = PHPExcel_Settings::CHART_RENDERER_JPGRAPH;
$rendererLibrary = 'jpgraph3.5.0b1/src';
$rendererLibraryPath = '/php/libraries/Charts/' . $rendererLibrary;

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

最后，您需要显式地告诉PDF Writer生成图表

$objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'PDF');
$objWriter->setIncludeCharts(TRUE);
$objWriter->save($outputFileName);