fix

    }

    #[Route('/readLogFile', name: 'readLogFile')]

    public function readLogFile(Request $request, FileUploader $fileUploader): Response

    public function readLogFile(Request $request): Response

    {

        $file = $request->files->get('file');

        $fileName = $fileUploader->upload($file);

        $text = $this->functions->readLogFile($fileName);

        $text = $this->functions->readLogFile($file);

        $response = new JsonResponse($text);

        $response->setEncodingOptions(JSON_UNESCAPED_UNICODE);

        return $response;

    }

    #[Route('/readFileLineByLine', name: 'readFileLineByLine')]

    public function readFileLineByLine(Request $request, FileUploader $fileUploader): Response // text.txt

    public function readFileLineByLine(Request $request): Response // text.txt

    {

        $file = $request->files->get('file');

        $fileName = $fileUploader->upload($file);

        $text = "";

        foreach ($this->functions->readFileLineByLine($fileName) as $line) {

        foreach ($this->functions->readFileLineByLine($file) as $line) {

            $text .= $line;

        }

        $response = new JsonResponse($text);

<?php

namespace App\Service;

use Symfony\Component\HttpFoundation\File\Exception\FileException;

use Symfony\Component\HttpFoundation\File\UploadedFile;

class FileUploader

{

    private $targetDirectory;

    public function __construct($targetDirectory)

    {

        $this->targetDirectory = $targetDirectory;

    }

    public function upload(UploadedFile $file)

    {

        $fileName = pathinfo($file->getClientOriginalName(), PATHINFO_FILENAME) .'.'. $file->guessExtension();

        try {

            $file->move($this->getTargetDirectory(), $fileName);

        } catch (FileException $e) {

            throw new FileException($e->getMessage());

        }

        return $this->getTargetDirectory() . $fileName;

    }

    public function getTargetDirectory()

    {

        return $this->targetDirectory;

    }

}

 No newline at end of file