title: PHP - merge arrays without array_merge
body: <p>I have a function that merges a bunch of bookings from different groups. I want to make it easier to set the group. Heres the function at the moment:</p>
  
  <pre><code>function groups() {
      $b1 = bookings(1);
      $b2 = bookings(2);
  
      $merge = array_merge($b1, $b2);
      return $merge;
  }
  </code></pre>
  
  <p>I would like to make it look something like this:</p>
  
  <pre><code>function groups() {
      $merge = bookings(1), bookings(2);
      return $merge;
  }
  </code></pre>
  
  <p>The reason is I would like to only have to edit one place if I would like to add a group. Now you have to add $b3 = bookings(3); on one line and $b3 in the array_merge. </p>
  
  <p>Is this possible? </p>