Panggilan ke Fungsi Anggota Move () di NULL

if (Input::file('image')) {

    if(file_exists(Input::file('image')->move(getcwd() . '/files/img/' . $post-    >image)))    
        {
            unlink(Input::file('image')->move(getcwd() . '/files/img/' . $post-    >image));
    ....
}
Muhammad Sukma Dwiyanto