title: Display instantly value in textbox using php
body: <p>I have a textbox where the value is depends on the input type into it.</p>
  
  <pre><code>&lt;input name="convertedcurrency" id="convertedcurrency" type="text" required="required"/&gt;
  </code></pre>
  
  <p>Is there any possibility that using any PHP code to display the value of the typed value instantly? (I was trying to echo the value using php at another textbox.)</p>
  
  <p>P/S: It must be a php code due to I need this value to combine with other php value for other use.</p>