singleton.php

   1 <?php
   2
   3 /**
   4  * Super singleton object that does everything. Used for unit testing.
   5  */
   6 class XHTMLCompiler
   7 {
   8
   9     /** Private instance of singleton */
  10     private static $_instance;
  11
  12     /** Private constructor, prevents other people from making it */
  13     private function __construct() {}
  14
  15     /** Retrieves the single instance of the object */
  16     static public function getInstance() {
  17         if(is_null(self::$_instance)) {
  18             self::$_instance = new self();
  19         }
  20         return self::$_instance;
  21     }
  22
  23     /**
  24      * Overloads the instance with another one, usually a mock object
  25      * @param Object substitute for XHTMLCompiler
  26      */
  27     static public function setInstance($stub) {
  28         // unit testing only!
  29         self::$_instance = $stub;
  30     }
  31
  32     /** Aborts script execution, equivalent to exit */
  33     public function quit() {exit;}
  34
  35     /** Sends an HTTP header, equivalent to header() */
  36     public function header() {
  37         $args = func_get_args();
  38         call_user_func_array('header', $args);
  39     }
  40
  41     /** Outputs text, equivalent to echo */
  42     public function paint($text) {echo $text;}
  43
  44     /** Retrieves the relative URI with which the page was requested. */
  45     public function getRequestURI() {return $_SERVER['REQUEST_URI'];}
  46
  47     /** Retrieves the relative URI which denotes the frontend PHP file */
  48     public function getPHPSelf() {return $_SERVER['PHP_SELF'];}
  49
  50 }
  51
  52 ?>