php - How to rename more than 1 file during upload ? Codeigniter -

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i have form upload 5 files, lets photo of person registering , other document him.

now i'm creating folder every registered user name ( btw, thing do? ), , want rename each file right name let photo,document a,document b , etc.

my current code

        $upload_setting['upload_path'] = './uploads/'.$_post['name'].'/';         $upload_setting['allowed_types'] = 'jpg|pdf';         $upload_setting['max_size'] = 5000; // 5 mb         $upload_setting['file_name'] = $_post['name']; // define uploaded file name           $this->load->library('upload', $upload_setting);           if ($this->form_validation->run() == false){             $this->load->view('form');          }           else{             if (!is_dir('./uploads/'.$_post['name'].'/')) {                 mkdir('./uploads/'.$_post['name'].'/', 0777, true);              }               $this->member->register($this->input->post(null, true));              $this->upload->do_upload('photo');             $this->upload->do_upload('document-a');             $this->upload->do_upload('document-b');

also how can let them free upload jpg,pdf,doc ? have link these file in profile page. how can know extension upload each document ?

please let me know if have suggestion or best practice upload , display each upload in profile.

thanks

to know extension of file can use-

    $newname= "name";     $path_parts = pathinfo($_files["picture"]["name"]);     $file_newname = $newname.'.'.$path_parts['extension'];

to upload-

if( $_files['picture']['name'] )              {                 $config['upload_path'] = 'images/receipt/';                 $config['allowed_types'] = 'gif|jpg|jpeg|png';                 $config['file_name'] = $file_newname; //here file being renamed                 $this->load->library('upload', $config);                 if ( ! $this->upload->do_upload('picture'))                 {                     $error = array('error' => $this->upload->display_errors());                      return false;                 }              }

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