PHP單例模式範例程式碼____PHP

<?php
class MySingleton {
 protected static $instance;
 
 /**
  * 擷取單例對象
  * @return MySingleton
  */
 public static function getInstance() {
  if (! isset ( self::$instance )) {
   self::$instance = new self ();
  }
  
  return self::$instance;
 }
 /**
  * 建構函式
  */
 private function __construct() {
  print ("__construct") ;
  print("\r\n");
 }
 /**
  * 禁用複製函數
  */
 final private function __clone() {
  print ("__construct") ;
  print("\r\n");
 }
 /**
  * 解構函式，對象銷毀時執行
  */
 function __destruct() {
  print ("__destruct") ;
  print("\r\n");
 }
 /**
  * 測試的函數對象
  */
 public function say() {
  $class = get_called_class ();
  printf ( $class );
  print("\r\n");
  print ("Hello Word...") ;
  print("\r\n");
 }
}

$obj = MySingleton::getInstance ();
$obj->say ();