title: PHP output in the textfield/text
body: <p>i have a little problem about PHP 
  there is two input for num1 and num2 
  and another input answer,,can the output in the php be putted in the input text answer??</p>
  
  <pre><code>&lt;input type="text" name ="num1"&gt;
  &lt;input type="text" name ="num2"&gt;
  &lt;input type="text" name ="answer"&gt;
  </code></pre>