title: php submit with PDO SQL issue
body: <p>I wanted to change from normal mysql query to PDO but since that time I can't even track the fault back.</p>
  
  <p>Is there anyone out there to help me? Any hint would be appreciated!</p>
  
  <p>Q1: what is wrong? Q2: how can the fault be tracked generally?</p>
  
  <pre><code>&lt;?php
  // Check if add button active, start this
  if (isset($_POST['create'])) {
   $new=htmlspecialchars($_POST['newgroup']);
   $sql = "INSERT INTO contactgroups (status, gr_name) VALUES(1, : new )";
   $sql-&gt;bindvalue( ': new', $new);
   $sql-&gt;execute();
   $arr = $sql-&gt;errorInfo();
   echo $arr;
   echo  "&lt;meta http-equiv=\"refresh\" content=\"0;URL=groups.php\"&gt;";
  }
  ?&gt;
  
  &lt;form id="group-in" method="post" action="groups.php"&gt;
  Add new Distribution group: &lt;input type="text" name="newgroup" placeholder="name..."&gt; &lt;input type="submit" name="create" value="Create new"&gt;
  Rename groupname: &lt;input type="text" value="&lt;?php echo $result['gr_name']; ?&gt;"&gt; &lt;input type="submit" name="rename" value="Rename"&gt;
  &lt;/form&gt;
  </code></pre>
  
  <p>the $_POST is coming, the SQL is running but after the bindPARAM/bindVALUE nothing comes...</p>