To work on file upload we are going to use the form helper. Here, is an example for file upload.

Example

Make Changes in the config/routes.php file, as shown in the following program.

config/routes.php

<?php
use CakeHttpMiddlewareCsrfProtectionMiddleware;
use CakeRoutingRouteDashedRoute;
use CakeRoutingRouteBuilder;
$routes->setRouteClass(DashedRoute::class);
$routes->scope(''/'', function (RouteBuilder $builder) {
   $builder->registerMiddleware(''csrf'', new CsrfProtectionMiddleware([
      ''httpOnly'' => true,
   ]));
   $builder->applyMiddleware(''csrf'');
   //$builder->connect(''/pages'',[''controller''=>''Pages'',''action''=>''display'', ''home'']);
   $builder->connect(''fileupload'',[''controller''=>''Files'',''action''=>''index'']);
   $builder->fallbacks();
});

Create a FilesController.php file at src/Controller/FilesController.php. Copy the following code in the controller file. Ignore, if already created.

Create uploads/ directory in src/. The files uploaded will be saved in uploads/ folder.

src/Controller/FilesController.php

<?php
   namespace AppController;
   use AppControllerAppController;
   use CakeViewHelperFormHelper;
   class FilesController extends AppController {
      public function index(){
         if ($this->request->is(''post'')) {
            $fileobject = $this->request->getData(''submittedfile'');
            $uploadPath = ''../uploads/'';
            $destination = $uploadPath.$fileobject->getClientFilename();
            // Existing files with the same name will be replaced.
            $fileobject->moveTo($destination);
         }
      }
   }
?>

Create a directory Files at src/Template and under that directory create a View file called index.php. Copy the following code in that file.

src/Template/Files/index.php

<?php
   echo $this->Form->create(NULL, [''type'' => ''file'']);
   echo $this-&gtl;Form->file(''submittedfile'');
   echo $this->Form->button(''Submit'');
   echo $this->Form->end();
   $uploadPath =''../uploads/'';
   $files = scandir($uploadPath, 0);
   echo "Files uploaded in uploads/ are:<br/>";
   for($i = 2; $i < count($files); $i++)
      echo "File is - ".$files[$i]."<br>";
?>

The files saved in uploads/ folder is listed for the user. Execute the above example by visiting the following URL −

http://localhost/cakephp4/fileupload −

Output

When you execute the above code, you should see the following output −