title: PHP: Testing whether three variables are equal
body: <p>I've never come across this before, but how would you test whether three variables are the same? The following, obviously doesn't work but I can't think of an elegant (and correct) way to write the following:</p>
  
  <p><code>if ($select_above_average === $select_average === $select_below_average) { }</code></p>