LINUX下PHP程序实现WORD文件转化为PDF文件的方法

<?php
set_time_limit(0);
function makepropertyvalue($name,$value,$osm){
$ostruct = $osm->bridge_getstruct("com.sun.star.beans.propertyvalue");
$ostruct->name = $name;
$ostruct->value = $value;
return $ostruct;
}
function word2pdf($doc_url, $output_url){
$osm = new com("com.sun.star.servicemanager") or die ("please be sure that openoffice.org is installed.\n");
$args = array(makepropertyvalue("hidden",true,$osm));
$odesktop = $osm->createinstance("com.sun.star .frame.desktop");
$owriterdoc = $odesktop->loadcomponentfromurl($doc_url,"_blank", 0, $args);
$export_args = array(makepropertyvalue ("filtername","writer_pdf_export",$osm));
$owriterdoc->storetourl($output_url,$export_args);
$owriterdoc->close(true);
}
$output_dir = "d:/lighttpd/htdocs/";
$doc_file = "d:/lighttpd/htdocs/2.doc";
$pdf_file = "2.pdf";
$output_file = $output_dir . $pdf_file;
$doc_file = "file:///" . $doc_file;
$output_file = "file:///" . $output_file;
word2pdf($doc_file,$output_file);
?>