I\'am trying to echo a vriable，但permalink不能作为可点击按钮工作。permalink刚刚显示在按钮外。

这是我的代码：

$perma = the_permalink();

$valid = \'<button class="btn btn-success btn-wide" href="\'.$perma.\'">
           Gegevens opgeslagen  <span class="glyphicon glyphicon-ok"></span>
           <a class="pull-right"><span class="label label-default">
           <span class="glyphicon glyphicon-ok"></span></span></a></p>  
          </button>\';


$id = get_the_ID();

if($id == \'2440\'){
        if($current_user->google_play_gebruikersnaam != ""){
                echo $valid;
              }