if (isset($_POST['uploadBtn']) && $_POST['uploadBtn'] == 'Upload') {
    if (isset($_FILES['file']) && $_FILES['file']['error'] === UPLOAD_ERR_OK) {

        $fileTmpPath           = $_FILES['file']['tmp_name'];
        $fileName              = $_FILES['file']['name'];
        $fileSize              = $_FILES['file']['size'];
        $fileType              = $_FILES['file']['type'];
        $fileNameCmps          = explode(".", $fileName);
        $fileExtension         = strtolower(end($fileNameCmps));
        $newFileName           = md5(time() . $fileName) . '.' . $fileExtension;
        $allowedfileExtensions = array('jpg', 'gif', 'png', 'zip', 'txt', 'xls', 'doc');
        echo $fileName;

        if (in_array($fileExtension, $allowedfileExtensions)) {
            $uploadFileDir = 'img/';
            $dest_path = $uploadFileDir . $newFileName;
            echo "vamoos";

            if(move_uploaded_file($fileTmpPath, $dest_path)) {
                $message ='File is successfully uploaded.';
                $_SESSION['message'] = $message;
                echo $message;
            }
            else {
                $message = 'There was some error moving the file to upload directory. Please make sure the upload directory is writable by web server.';
                $_SESSION['message'] = $message;
                echo "3";
            }
        }
    }else {echo "algo no funciona1"; }
}else {echo "algo no funciona"; }

$selectMeme = $selectPlantilla = "";
    $invisibleMeme = $invisiblePlantilla = "invisible";
    $error = $selected = "";
    if ( isset($_GET['u']) ) {

        if ( $_GET['u'] == "meme" ) {
            $selected           = "memes";
            $selectMeme         = "checked";
            $invisibleMeme      = "";
            $selectPlantilla    = "";
            $invisiblePlantilla = "invisible";

        } else {
            $selected           = "plantillas";
            $selectPlantilla    = "checked";
            $invisiblePlantilla = "";
            $selectMeme         = "";
            $invisibleMeme      = "invisible";
        }
    }