title: Regex to get information from an input form
body: <p>I want to be able to catch the website url from this input form:</p>
  
  <pre><code>&lt;input name="website" id="website" type="text" data-attr="website" value="https://www.toureiffel.paris/" placeholder="Entrer l’adresse URL du site Web"&gt;
  </code></pre>
  
  <p>This is what I used in my <code>preg_match</code>:</p>
  
  <pre><code>$page = file_get_contents('https://...');
  preg_match('/data-attr=\"website\" value=\"(.+?)\"/is', $page, $website);
  $website = $website[1];
  </code></pre>
  
  <p>But the <code>$website</code> variable is empty.</p>
  
  <p>What I'm missing here please ?</p>
  
  <p>Thanks.</p>