Retrieve Images From Folder with Codeigniter

Question

My teacher,he was uploading and retrieving images from folder with ID recognition. It works with database.

1. So, when we upload an image, it will be stored in a folder with it's name changing automatically with ID.
2. Example: The upload form must be on "yourwebsite.com/yourpages/3144242" so the image will be stored as "3144242" and blablabla the same for other pages with ID

This is how he upload and retrieve it

 <?php
    $ff = './assets/images/kegiatan/'.$_SESSION['idkeg'].'.jpg';
      if( file_exists( $ff ) ) {
          <img src="<?= base_url()?>assets/images/kegiatan/<?=$_SESSION['idkeg']?>.jpg" />
 <?php
       }
 ?>

Retrieve images part:

      if( file_exists( $ff ) ) {
          <img src="<?= base_url()?>assets/images/kegiatan/<?=$_SESSION['idkeg']?>.jpg" />
 <?php
       }
 ?>

However, I change it a bit so I don't have to use a database and $_SESSION things. With this:

<?php
   $ff = './assets/images/kegiatan/'.$this->input->post('img_name').'.jpg';
 ?>
  <form id="form" class="kart" action="<?= base_url()?>gallery/upload2" method="post" enctype="multipart/form-data">
    <div class="form-group">
      <input type="text" class="form-control" name="img_name" required="required">
    </div>
    <div class="form-group">
       <input type="file" class="form-control" name="foto">
    </div>
    <div class="form-group">
        <button type="submit" class="btn btn-common" value="Update"><i class="fa fa-upload fa-2x"> Upload</i></button>
    </div>
 </form>

It works uploading images into folder "kegiatan" (means activity) with simply write the names of images in a form. The img_name that you have input, now become the name of that image.

Now I have a little problem to retrieve that images. How?

Answer 1

mistake in your form I realized is asking user to enter image name and get image from folder by using that input value.

First of all, I haven't tried upload an image with codeigniter but I will answer reference to php itself.

When we get an image as input from user by form, then we use "move_uploaded_file" function in php and we send temp_file, path with file name arguments to this function to save the file user selected in the form we prepared.

move_uploaded_file(string $filename , string $target);
// $filename: I use $_FILES['getFileUpload']['tmp_name'] for this argument
// $target: I define path with file name, eg: uploads/files/new_file_25.jpg for jpg image

So, you souldn't ask user to enter file name, because you will deifne it. Or, you must use "img_name" that you asked user to enter as file name which is most probably won't satisfy your ID prediction.

I hope this will help you.