How to delete an image from Storage Folder 5.2?

Question

I’m using this code to upload image this all working my doubt and in the if condition to delete the old image I have to leave a default image.jpg as default plus my condition if this deleting that image. my question and how can I leave this image always default and continue using the condition to delete someone can help ?

 public function update_avatar(Request $request){

    if($request->hasFile('avatar')){
        $user            = Auth::user();
        $old_avatar      = $user->avatar;
        $file            = $request->file('avatar');
        $filename        = time() . '.' . $file->getClientOriginalExtension();
        $old_file_avatar = $old_avatar  . '.' . $file->getClientOriginalExtension();
        $image           = Image::make($file);

        $image->fit(250, 250, function ($constraint) {
            $constraint->aspectRatio();
        });

        Storage::put($filename, (string) $image->encode());

        $user->avatar = $filename;
        $user->save();

    }

    //delete image
    if (Auth::user() !== $filename) {
        Storage::delete($old_avatar);
    }

    return redirect('profile');
}

public function getUserImage()
{
    $user        = Auth::user();
    $old_avatar  = $user->avatar;
    $file        = Storage::disk('local')->get($old_avatar);
    return Response::make($file,200,[ 'Content-Type' => $old_avatar]);


}

I want to delete the old image and put the new one if already makes the question and I do not want it to overwrite the default image.jpg that and default in the database for all users.

 //delete image
if (Auth::user() !== $filename) {
    Storage::delete($old_avatar);
}

Answer 1

use the unlink function().

Example:

unlink('caminho_da_imagem');