Show duplicated key warning in PHP array definition

Question

Is it possible to get a warning in the following code?

error_reporting(E_ALL);

  $s = array(
      'a' => '1',
      'a' => '1'
   );

var_export( $s );

Answer 1

Your only hope (apart from count-ing yourself) is that your editor is smart enough to highlight the typo. This screenshot is from PHPStorm: