title: php echo html cannot use post data correctly
body: <p>okay so i have a php page thats post a peice of data to hello.php
  hello php is basically just an echo stament echoing out html </p>
  
  <p>the problems comes when trying to add postdata to a hiddin input field </p>
  
  <p>heres an example of my hello.php code</p>
  
  <pre><code>&lt;?php 
  echo"
  &lt;form action='polly.php' method='post' required='required'&gt;
  &lt;input class='required' name='fpuser' id='fpuser' value=\"$_POST\"&gt;
  ";
  ?&gt;
  </code></pre>
  
  <p>this above works fine but then when i try to access a post key like so my page just does not work </p>
  
  <pre><code>&lt;?php 
  echo"
  &lt;form action='polly.php' method='post' required='required'&gt;
  &lt;input class='required' name='fpuser' id='fpuser' value=\"$_POST['username']\"&gt;
  ";
  ?&gt;
  </code></pre>
  
  <p>how can i fix this people</p>