I can not remove folder

I'm trying to delete a record from database and remove its own folder. You can see the code below. I wrote "problem occurred- ALWAYS WORK THIS IF". I can not solve this problem. I'm waiting for your help 

PHP Code:

 public function delete($incomingId)
    {
        $gallery = $this->gallery_model->get(
            array(
                'id' => $incomingId
            )
        );
        if ($gallery) {

            if ($gallery->gallery_type != 'video') {
                if ($gallery->galery_type = 'image') {
                    $path = "uploads/$this->viewFolder/images/$gallery->folder_name";
                } elseif ($gallery->galery_type = 'files') {
                    $path = "uploads/$this->viewFolder/files/$gallery->folder_name";
                }
                $delete_folder = rmdir($path);
                if (!$delete_folder) { // always this works begin
                    $alert = array(
                        "title" => "Error",
                        "text" => "problem occurred- ALWAYS WORK THIS IF",
                        "type" => "error"
                    );
                } // always this works end
                // session
                $this->session->set_flashdata("alert", $alert);
                redirect(base_url("galleries"));
                die;
            }
            $delete = $this->gallery_model->delete(
                array(
                    'id' => $incomingId
                ));
            if ($delete) {
                $alert = array(
                    "title" => "Success",
                    "text" => "OK.",
                    "type" => "success"
                );

            } else {

                $alert = array(
                    "title" => "Error",
                    "text" => "problem occurred",
                    "type" => "error"
                );
            }
            $this->session->set_flashdata("alert", $alert);
            redirect(base_url("galleries"));
        } 


The directory must be empty for rmdir() to work.

Simpler is always better

Most likely either the directory is not empty or your script doesn't have permission to delete it. If it's not empty, you could try the file_helper and its delete_files method, which will delete all files within the directory and can optionally delete the directory itself.

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It could also contain a hidden file which you would not see.

What did you Try? What did you Get? What did you Expect?

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Okay it's my fault. I changed this

Old code (not work)

PHP Code:

$delete_folder = rmdir($path);  
if (!$delete_folder) { // always this works begin
                    $alert = array(
                        "title" => "Error",
                        "text" => "problem occurred- ALWAYS WORK THIS IF",
                        "type" => "error"
                    );
                } // always this works end
                // session
                $this->session->set_flashdata("alert", $alert);
                redirect(base_url("galleries"));
                die; 


New code (it works)

PHP Code:

    $delete_folder = delete_files($path);
                if (!$delete_folder) {
                    $alert = array(
                        "title" => "Error",
                        "text" => "problem occurred-.",
                        "type" => "error"
                    );
                    $this->session->set_flashdata("alert", $alert);
                    redirect(base_url("galleries"));
                }
            }