使用CodeIgniter将图像上传到我的数据库

Question

I know it's wrong to upload images into a db but I need to do it for now.

My function looks like this:

public function runk_image_post()
{
    $id = $this->get('id');
    $imagePath = $_FILES['data']['tmp_name'];

    /// $imagePath = Applications/MAMP/tmp/php/php6cpBhM

    $this->db->trans_start();
    $this->db->query("UPDATE runks SET runk_image = LOAD_FILE('$imagePath') WHERE runk_id='$id';");
    $this->db->trans_complete();

    $query = $this->db->query("SELECT * FROM runks WHERE runk_id = '$id';");
    $message = $query->row();

    if ($this->db->trans_status() === FALSE) {
        $data = ['message' => 'Image not uploaded'];
        $this->response($data, REST_Controller::HTTP_BAD_REQUEST);
    } else {
        $this->response($message, REST_Controller::HTTP_OK);
    }
}

It returns the HTTP_OK response but nothing gets added in the runk_image column (type: blob) in my database. What am I doing wrong?

I think it has to do with my $imagePath variable.

Answer 1

If you use LOAD_FILE(), you should pass the absolute path of the file.

EDIT: I do not think LOAD_FILE() should be used (or at least its no good practice) because using it asserts that your web server and the database server have access to the same file system, which is not always the case.

Otherwize you should load the file contents to a variable and pass it as value to your 'runk_image' blob, in this case the code should look as follows:

public function runk_image_post(){
    $id = $this->get('id');
    $imagePath = $_FILES['data']['tmp_name'];

    $imageBin = file_get_contents($imagePath);

    $this->db->trans_start();
    $this->db->where('runk_id', $id);
    $this->db->update('runks',array('runk_image'=>$imageBin));
    $this->db->trans_complete();

    $message = $query->row();

    if ($this->db->trans_status() === FALSE) {
        $data = ['message' => 'Image not uploaded'];
        $this->response($data, REST_Controller::HTTP_BAD_REQUEST);
    } else {
        $this->response($message, REST_Controller::HTTP_OK);
    }}