echo "{exists:1}"; } else { echo "{exists:0}"; } } } if ($_GET['ups']) { if (isset($_GET['uid'])) { $song = new Song(); $song->upload(); } } else { if ($_GET['gs']) { if (isset($_GET['filename']) && isset($_GET["owner"])) { $song = new Song(); $song->getsong(); } } else { if ($_GET['ds']) { if (isset($_GET['filename']) && isset($_GET["owner"])) { $song = new Song(); $song->download(); } } else { if ($_GET['csmd']) { if (isset($_GET['sid']) && (isset($_POST['name']) || isset($_POST['artist']) || isset($_POST['year']) || isset($_POST['album']) || isset($_POST['genre']) || isset($_POST['lyrics']))) { $song = new Song(); $song->changemetadata(); } } else { if ($_GET['rs']) {