使用PHPExcel和tcpdf在php中将excel文件转换为pdf时出错

Question

我试图将excel文件另存为PDF，但是不断收到错误消息

  

致命错误：未捕获PHPExcel_Writer_Exception：PDF渲染库   尚未定义。在   C：\ xampp \ htdocs \ excelpdf \ vendor \ phpoffice \ phpexcel \ Classes \ PHPExcel \ Writer \ PDF.php：48   堆栈跟踪：＃0   C：\ xampp \ htdocs \ excelpdf \ vendor \ phpoffice \ phpexcel \ Classes \ PHPExcel \ IOFactory.php（139）：   PHPExcel_Writer_PDF-> __ construct（Object（PHPExcel））＃1   C：\ xampp \ htdocs \ excelpdf \ pdf.php（20）：   PHPExcel_IOFactory :: createWriter（Object（PHPExcel），'PDF'）＃2 {main}   扔进去   C：\ xampp \ htdocs \ excelpdf \ vendor \ phpoffice \ phpexcel \ Classes \ PHPExcel \ Writer \ PDF.php   在第48行

<?php

    require "vendor/autoload.php";
    $filename = "phpzag.xls";
    $rendererName = PHPExcel_Settings::PDF_RENDERER_TCPDF;
    //$rendererName = PHPExcel_Settings::PDF_RENDERER_MPDF;
    //$rendererName = PHPExcel_Settings::PDF_RENDERER_DOMPDF;
    $rendererLibrary = 'tcPDF5.9';
    //$rendererLibrary = 'mPDF5.4';
    //$rendererLibrary = 'domPDF0.6.0beta3';
    $rendererLibraryPath = dirname(__FILE__).'/../../../tcpdf';
    $objPHPexcel = new PHPExcel();
    $excelReader = PHPExcel_IOFactory::createReaderForFile($filename);
    $objPHPexcel = PHPExcel_IOFactory::load($filename);
    $objWriter = PHPExcel_IOFactory::createWriter($objPHPexcel, 'PDF');
    $objWriter->writeAllSheets();
    $objWriter->save('write.pdf');
    echo date('H:i:s')."Peak memory usage: ".(memory_get_peak_usage(true)/1024/1024) . " MBrn";
    echo date('H:i:s')."Done writing files.rn";

?>