php office如何转 pdf

<?php

word2pdf(); function word2pdf()
{    $filenamedoc = dirname(__FILE__)."/index.docx";    $filenamepdf = dirname(__FILE__)."/index.pdf";    $dd = $word = new COM("KWPS.Application") or die ("Could not initialise Object.");    // 或者 $dd = $word = new COM("Word.Application") or die ("Could not initialise Object.");
    // set it to 1 to see the MS Word window (the actual opening of the document)
    $word->Visible = 0;    // recommend to set to 0, disables alerts like "Do you want MS Word to be the default .. etc"
    $word->DisplayAlerts = 0;    // open the word 2007-2013 document

    $word->Documents->Open($filenamedoc);    // save it as word 2003
    // convert word 2007-2013 to PDF

    //判断要生成的文件名是否存在
    if(file_exists($filenamepdf)) {        //存在就删除
        unlink ($filenamepdf);
    }    $word->ActiveDocument->ExportAsFixedFormat($filenamepdf, 17, false, 0, 0, 0, 0, 7, true, true, 2, true, true, false);    // quit the Word process
    $word->Quit(false);    // clean up
    unset($word);    if(!function_exists('read_pdf')) {        header('Content-type: application/pdf');        header('filename='.$filenamepdf);        readfile($filenamepdf);
        read_pdf('Python_study.pdf');
    }    echo 'ok';
}?>

if(!function_exists('read_pdf')) {  function read_pdf($file) {    if(strtolower(substr(strrchr($file,'.'),1)) != 'pdf') {      echo '文件格式不对.';      return;
    }    if(!file_exists($file)) {      echo '文件不存在';      return;
    }    header('Content-type: application/pdf');    header('filename='.$file);    readfile($file);
  }
}