运行到 Linux 服务器时出现 HTTP 错误 500？

Question

我有此 PHP 代码，用于使用 xampp 中的 PhpSpreadsheet 将 excel 导入 mysql。此代码在 Windows 环境中运行时没有问题，但如果我使用 XAMPP Linux 将其托管到 Linux 服务器（Ubuntu 22.04）上，则会出现错误“HTTP ERROR 500”。我已根据 phpspreadsheet.readthedocs.io 文档安装了 PhpSpreadsheet 所需的所有软件包和扩展。如果此错误是针对服务器端的，我该怎么办？请帮忙

这些是我的导入文件的代码

composer.json

{
"name": "mark/import1",
"autoload": {
    "psr-4": {
        "Mark\\Import1\\": "src/"
    }
},
"authors": [
    {
        "name": "mark"
    }
],

 "require": {
    "phpoffice/phpspreadsheet": "^1.28"
},
"config": {
    "platform": {
        "php": "8.1"
    }
}
}

导入代码

<?php
 $con = mysqli_connect('localhost','root','','db_import');

 require 'vendor/autoload.php';

 use PhpOffice\PhpSpreadsheet\Spreadsheet;
 use PhpOffice\PhpSpreadsheet\Writer\Xlsx;

  if(isset($_POST['save_excel_data']))
  {
   $fileName = $_FILES['import_file']['name'];
   $file_ext = pathinfo($fileName, PATHINFO_EXTENSION);

   $allowed_ext = ['xls','csv','xlsx'];

  if(in_array($file_ext, $allowed_ext))
  {
    $inputFileNamePath = $_FILES['import_file']['tmp_name'];
    $spreadsheet = \PhpOffice\PhpSpreadsheet\IOFactory::load($inputFileNamePath);
    $data = $spreadsheet->getActiveSheet()->toArray();

foreach($data as $row)
{
            $fullname = $row['0'];
            $email = $row['1'];
            $phone = $row['2'];
            $course = $row['3'];
    
    $studentQuery = "INSERT INTO students (fullname,email,phone,course) 
                            VALUES('$fullname','$email','$phone','$course')";
            $result = mysqli_query($con, $studentQuery);
            $msg = true;    
}
 }
 }