title: display database field in textbox
body: <p>I am trying to display a database input in a textbox for editing.  I cant seem to get it working?!
  The page links from a forum post edit button.  Firstly, I don't know how to get the database info for that particular field to be displayed and also I don't understand how to make sure the post that the user clicks to edit is the post that is displayed. </p>
  
  <p>My code looks like this</p>
  
  <pre><code>&lt;?php
  #data preparation for the query 
  $id=$_GET['id']; 
  
  # selects title and description fields from database 
  $sql = "SELECT a_answer FROM $tbl_name WHERE question_id='$id'"; 
  $result=mysql_query($sql);
  $rows=mysql_fetch_array($result);
  
  ?&gt; 
  &lt;h3&gt;Edit&lt;/h3&gt; &lt;form action="save_edit.php" enctype="multipart/form-data" method="post" name="myForm" /&gt;   
  &lt;table&gt;     
  
  &lt;tr&gt;       
  &lt;td&gt;&lt;b&gt;Answer&lt;/b&gt;&lt;/td&gt;       
  &lt;td&gt;&lt;textarea cols="80%" rows="10" name="a_answer"&gt;&lt;?php echo $row['$a_answer']; ?&gt;&lt;/textarea&gt;&lt;/td&gt;   
    &lt;/tr&gt;  
     &lt;/table&gt;   &lt;input name="id" type="hidden" value="&lt;? echo $id; ?&gt;"&gt;   
     &lt;input name="enter" type="submit" value="Edit"&gt; &lt;/form&gt;  
  
    &lt;?php mysql_close(); ?&gt;
  </code></pre>