$products = Product::all();
foreach ($products as $key => $product) {
    // ------main photo delete--------
    if (Storage::disk('public')->exists('product/medium-'.$product->cover_photo))
    {
       Storage::disk('public')->delete('product/medium-'.$product->cover_photo);
    }

    if (Storage::disk('public')->exists('product/small-'.$product->cover_photo))
    {
       Storage::disk('public')->delete('product/small-'.$product->cover_photo);
    }

    if (Storage::disk('public')->exists('product/xsmall-'.$product->cover_photo))
    {
       Storage::disk('public')->delete('product/xsmall-'.$product->cover_photo);
    }

    // ---------delete others photo-----------
    $post_image = explode("|",$product->others_photo);
    foreach ($post_image as $key => $image) {
        //delete old image
        if (Storage::disk('public')->exists('product/medium-'.$image))
        {
           Storage::disk('public')->delete('product/medium-'.$image);
        }

        if (Storage::disk('public')->exists('product/small-'.$image))
        {
           Storage::disk('public')->delete('product/small-'.$image);
        }

        if (Storage::disk('public')->exists('product/xsmall-'.$image))
        {
           Storage::disk('public')->delete('product/xsmall-'.$image);
        }
    }

}
return 'ok';