title: "Cannot pass parameter 2 by reference" Error in PHP
body: <p>When I run this code for updating my likedOne column and making it empty ("")....</p>
  
  <pre><code>    $sql11 = $conn-&gt;prepare("UPDATE UserData SET likedOne=? WHERE username=?");
      $sql11-&gt;bind_param('ss',"",$Username);
      $Username = "netsgets";
      $sql11-&gt;execute();
  </code></pre>
  
  <p>I get this error....</p>
  
  <pre><code>1 Fatal error: Cannot pass parameter 2 by reference in /xxx/xxx/xxx/test.php on line 36. 
  </code></pre>
  
  <p>The line is....</p>
  
  <pre><code>$sql11-&gt;bind_param('ss',"",$Username);
  </code></pre>
  
  <p>What's wrong?</p>