Pass variables without escaping nor sanitizing to t() in Drupal 8

In Drupal 7 it was useful to do things like this: 

   
function mymodule_content() {
  $links[] = l('Google', 'http://www.google.com');
  $links[] = l('Yahoo', 'http://www.yahoo.com');
  return t('Links: !types', array('!types' => implode(', ', $links)));
}
    

In this case, we are using the exclamation mark to pass the $links into our string but unfortunately, Drupal 8 doesn't have this option in the FormattableMarkup::placeholderFormat(), the good news is that even without this there is a way to accomplish the same thing. 

According to the documentation:

• @variable: When the placeholder replacement value is:
  • A string, the replaced value in the returned string will be sanitized using \Drupal\Component\Utility\Html::escape().
  • A MarkupInterface object, the replaced value in the returned string will not be sanitized.
  • A MarkupInterface object cast to a string, the replaced value in the returned string be forcibly sanitized using\Drupal\Component\Utility\Html::escape().

Using the @ as the first character escapes the variable if it is a string but if we pass a MarkupInterface object it is not going to be sanitized, so we just need to return an object of this type.

And Drupal 8 has a class that implements MarkupInterface called: Markup, so the code above for Drupal 8 will look like this: 

   
public function content() { 
$markup = new Markup(); 
$links[] = Link::fromTextAndUrl('Google', Url::fromUri('http://www.google.com'))->toString(); 
$links[] = Link::fromTextAndUrl('Yahoo', Url::fromUri('http://www.yahoo.com'))->toString(); 
$types = $markup->create(implode(', ', $links)); 
return [ '#markup' => t('Links %links', ['%links' =>$types]), ]; 
}
 ​​​​​

And that's it, our string will display the links. 

If you want to see a real scenario where this is helpful, check this Comment Notify code For Drupal 7 and this patch for the D8 version.