title: How to set default date in Symfony html5 datepicker?
body: <p>How to set default date for symfony html5 form widet from the controller ?</p>
  
  <pre><code>$date = date(d-m-Y); //todays date
  
  ...
      -&gt;add('starts', 'date', [
          'widget' =&gt; 'single_text',
          'format' =&gt; 'dd-MM-yyyy',
          'placeholder'=&gt;$data,
      ])
  ...
  </code></pre>
  
  <p><strong>'placeholder'=>$data</strong> does nothing. After page is loaded my form input contains dd.mm.yyyy</p>