How to convert php excel to pdf

<?php
namespace App\Libs;
 
class Office2pdf
{
private $osm;
public function __construct()
{
$this->osm = new \COM("com.sun.star.ServiceManager")or die ("Please be sure that OpenOffice.org is installed.n"); 
}
public function MakePropertyValue($name,$value)
{
$oStruct = $this->osm->Bridge_GetStruct("com.sun.star.beans.PropertyValue");
$oStruct->Name = $name;
$oStruct->Value = $value;
return $oStruct;
}
public function transform($input_url, $output_url)
{
$args = array($this->MakePropertyValue("Hidden",true));
 
$oDesktop = $this->osm->createInstance("com.sun.star.frame.Desktop");
 
$oWriterDoc = $oDesktop->loadComponentFromURL($input_url,"_blank", 0, $args);
$export_args = array($this->MakePropertyValue("FilterName","writer_pdf_Export"));
 
$oWriterDoc->storeToURL($output_url,$export_args);
$oWriterDoc->close(true);
return $this->getPdfPages($output_url);
}
public function run($input,$output)
{
$input = "file:///" . str_replace("\\","/",$input);
$output = "file:///" . str_replace("\\","/",$output);
return $this->transform($input, $output);
}
/**
* 获取PDF文件页数的函数获取
* 文件应当对当前用户可读（linux下）
* @param  [string] $path [文件路径]
* @return int
*/
public function getPdfPages($path)
{
if(!file_exists($path)) return 0;
if(!is_readable($path)) return 0;
// 打开文件
$fp=@fopen($path,"r");
if (!$fp) 
{
return 0;
}
else 
{
$max=0;
while(!feof($fp)) 
{
$line = fgets($fp,255);
if (preg_match(&#39;/\/Count [0-9]+/&#39;, $line, $matches))
{
preg_match(&#39;/[0-9]+/&#39;,$matches[0], $matches2);
if ($max<$matches2[0]) $max=$matches2[0];
}
}
fclose($fp);
// 返回页数
return $max;
}
}
 
}

"autoload": {
        "files": [
            "app/Libs/Office2pdf.php"
        ]
    }
/*这段是加入的，如果有files直接把你的类文件路径放进去就行
"files": [
            "app/Libs/Office2pdf.php"
        ]
*/

use app\Libs\Office2pdf;
$r = new Office2pdf;  //实例化后就可以用了