Description:
------------
./php -v
PHP 5.6.9 (cli) (built: May 15 2015 13:05:42) 
Copyright (c) 1997-2015 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2015 Zend Technologies
    with Zend OPcache v7.0.4-dev, Copyright (c) 1999-2015, by Zend Technologies
    with Xdebug v2.2.5, Copyright (c) 2002-2014, by Derick Rethans

You can define an array in PHP 5.6 on a constant if you use const.  However, you can't if you use define.  This seems like inconsistent behaviour.  



Test script:
---------------
<?php
const A = [1,2,3];
var_dump (A);
define ("B", [4,5,6]);
var_dump (B);


Expected result:
----------------
array(3) {
  [0] =>
  int(1)
  [1] =>
  int(2)
  [2] =>
  int(3)
}
array(3) {
  [0] =>
  int(4)
  [1] =>
  int(5)
  [2] =>
  int(6)
}


Actual result:
--------------
array(3) {
  [0] =>
  int(1)
  [1] =>
  int(2)
  [2] =>
  int(3)
}
PHP Warning:  Constants may only evaluate to scalar values in php shell code on line 1
PHP Stack trace:
PHP   1. {main}() php shell code:0
PHP   2. define() php shell code:1
PHP Notice:  Use of undefined constant B - assumed 'B' in php shell code on line 1
PHP Stack trace:
PHP   1. {main}() php shell code:0
string(1) "B"