title: How to recover data from a Form in Symfony4?
body: <p>I would like to understand how can I transfer the input data from a form, into another form on another page.</p>
  
  <p>Say I insert a TITLE ("Land of Oz") and a DESCRIPTION ("book for children") on my first page where I have two fields title and description that came from a Form), and then I would like to see them already present in the same fields but on another page... (I also have a title and description fields on my next page but I want the alredy populated with "Land of Oz" and "book for children" values)</p>
  
  <p>I tried to do it with $_POST but it did not work. </p>
  
  <p>In twig (where I input data):</p>
  
  <pre><code>    &lt;tr&gt;
          &lt;td align="right"&gt;&lt;label for=""&gt;&lt;b&gt;Titre *: &lt;/b&gt;&lt;/label&gt;&lt;/td&gt;
          &lt;td&gt; {{ form_widget(post_form.title) }} &lt;/td&gt;
      &lt;/tr&gt;
  
      &lt;tr&gt;
          &lt;td align="right"&gt;&lt;label for=""&gt;&lt;b&gt;Description : &lt;/b&gt;&lt;/label&gt;&lt;/td&gt;
          &lt;td&gt; {{ form_widget(post_form.description) }} &lt;/td&gt;
      &lt;/tr&gt;
  </code></pre>
  
  <p>In Controller (of the next page):</p>
  
  <pre><code>    $post = new MySite();  
  
      $post-&gt;setTitle('TITLE');             // instead of TITLE I want my data to be displayed
      $post-&gt;setDescription('DESCRIPTION'); // instead of DESCRIPTION I want my data to be displayed
  </code></pre>