CRM/Utils/Constant.php

   1 <?php
   2 /*
   3  +--------------------------------------------------------------------+
   4  | Copyright CiviCRM LLC. All rights reserved.                        |
   5  |                                                                    |
   6  | This work is published under the GNU AGPLv3 license with some      |
   7  | permitted exceptions and without any warranty. For full license    |
   8  | and copyright information, see https://civicrm.org/licensing       |
   9  +--------------------------------------------------------------------+
  10  */
  11
  12 /**
  13  *
  14  * @package CRM
  15  * @copyright CiviCRM LLC https://civicrm.org/licensing
  16  */
  17
  18 /**
  19  * Class CRM_Utils_Constant
  20  */
  21 class CRM_Utils_Constant {
  22
  23   /**
  24    * Determine the value of a constant, if any.
  25    *
  26    * If the specified constant is undefined, check for an environment
  27    * variable, defaulting the passed in default value.
  28    *
  29    * @param string $name
  30    * @param mixed $default
  31    *   (optional)
  32    * @return mixed
  33    */
  34   public static function value(string $name, $default = NULL) {
  35     if (defined($name)) {
  36       return constant($name);
  37     }
  38     if (($value = getenv($name)) !== FALSE) {
  39       define($name, $value);
  40       return $value;
  41     }
  42     return $default;
  43   }
  44
  45 }