In this post, I am gonna give an example to upload Images and store its file path in the database with the help of custom component.

Example:

Add this UploadComponent class in app/controller/component folder.

 <?php    
class UploadComponent extends Component {
    public function start_upload($file_Details) {
     //echo "<pre>@@@";
     print_r($file_Details);
        $filename = ($file_Details['name']);
        $filename = time().$filename;
        $file_path =   WWW_ROOT  . 'files/'.$filename;
        move_uploaded_file($file_Details['tmp_name'],$file_path);
        return $filename;
     }

      } 
?>

Important Syntax Meaning:

$file_path = WWW_ROOT. 'img'; this will set the webroot path with the folder name where the file is to be uploaded.

$filename = time().$filename; this syntax will append the random no before the file name so that it wont get conflict from already existing file.

Add this code in Controller class.

public function uploadfile() {

  $file_name1 = '';

  if ($this->request->is('post')) { 

  $file_name1=$this->Upload->start_upload($this->data['uploadFile']['pdf_path']);   

        $data=array();
        $data['User']['id'] = CakeSession::read("Auth.User.id");
        $data['User']['imagename'] = $file_name1;
        $this->User->save($data);       // save the file path in database

        echo $data['User']['id']." + ".$data['User']['imagename'];
         }

  $this->set('image',$file_name1); 
}

Add this code in app/view/users folder & save it as uploadfile.ctp.

<div class="users view">
<h2><?php echo('User'); ?></h2>
<?php
echo $this->Form->create('uploadFile', array('type' => 'file')); //input field of type file that allows browse your file.
echo $this->Form->input('pdf_path', array('type' => 'file','label' => 'Pdf'));
echo $this->Form->end('Upload file');
$image_src = $this->webroot.'img/'.$image;
?>
<img src="<?php echo $image_src;?>">
</div>