PHP Singleton类代码示例

 public static function exceptionHandle(Exception $exception)
 {
     if (DEBUG_MODE) {
         //直接输出调试信息
         echo nl2br($exception->__toString());
         echo '<hr /><p>Router:</p><pre>';
         print_r(Singleton::getInstance('Router'));
         echo '</pre>';
     } else {
         $code = $exception->getCode();
         $message = nl2br($exception->getMessage());
         /*
                     如果错误码"可能为"合法的http状态码则尝试设置,
                     setStatus()方法会忽略非法的http状态码. */
         if ($code >= 400 && $code <= 505 && !headers_sent()) {
             ResponseModule::setStatus($code);
         }
         $var_list = array('message' => $message, 'code' => $code, 'file' => $exception->getFile(), 'url' => Singleton::getInstance('Router')->getUrl());
         if ($error_file = self::_getErrorFilePath($code)) {
             Lugit::$view = new View($var_list);
             Lugit::$view->render($error_file);
         } else {
             echo 'No error page is found.<pre>';
             print_r($var_list);
             echo '</pre>';
         }
     }
     exit;
 }

 public static function GetInstance()
 {
     if (Singleton::$instance == null) {
         Singleton::$instance = new Singleton();
     }
     return Singleton::$instance;
 }

 public function transform()
 {
     // get transformed document
     $doc = $this->__Document->transform();
     // set content of body
     $this->__Layout->__Body()->write($doc);
     // Verbrauchter PHP Speicher (RAM)
     $memory = fbytes(memory_get_usage());
     // Skriptlaufzeit
     $runtime = round(microtime(true) - RUNTIME, 5);
     $req = Singleton::getInstance('HTTP_Request');
     if (substr_count($req->getRequestUri(), 'ajax.') > 0) {
         return $this->__Layout->getAJAX();
     }
     $this->__Layout->__Body()->write('<!-- runtime: ' . $runtime . ' // memory usage: ' . $memory . ' -->');
     // check logfiles
     $sys_logs = scandir(LOG_PATH);
     if (count($sys_logs) > 2) {
         jgrowl(count($sys_logs) - 2 . ' Log(s) verfügbar', 'Systemfehler', 'warning');
     }
     $app_logs = scandir(RESOURCE_PATH . '/logs');
     if (count($app_logs) > 2) {
         jgrowl(count($app_logs) - 2 . ' Log(s) verfügbar', 'Anwendungsfehler', 'warning');
     }
     $notes = Singleton::getInstance('Watchdog')->getNotifications();
     $this->__Layout->__Body()->write($notes);
     return $this->__Layout->getLayout();
     // end function
 }

 public static function getInstance()
 {
     if (!self::$instance instanceof self) {
         self::$instance = new Singleton();
     }
     return self::$instance;
 }

 public function bRegisterUser($reg_email, $reg_fname, $reg_aname)
 {
     # get the connection
     $mysqli = Parent::connect();
     # get password generator
     $oPassword = Singleton::getInstance('Password');
     # get a random password
     $random_password = $oPassword->encryptPassword();
     # check if succeed otherwise try again
     if (!$random_password) {
         $random_password = $oPassword->randomPassword();
     }
     #lowercase email
     $slEmail = strtolower($reg_email);
     if ($sStmt = $mysqli->prepare("INSERT INTO `users`(`username`, `password`, `voornaam`, `achternaam`, `email`) VALUES (?,?,?,?,?)")) {
         # bind
         $sStmt->bind_param('sssss', $reg_fname, $random_password, $reg_fname, $reg_aname, $reg_email);
         # execute
         if ($sStmt->execute()) {
             User::sendRegistrationMail($reg_email, $random_password);
         } else {
             echo "een paar fouten";
         }
     }
 }

 function test_sti_field_is_saved_and_used_correctly()
 {
     setup_sqlite_test_db();
     # Create a dummy test entries
     $dummy = Test::create(array("dummy" => "TestDummy"));
     $this->assertEqual($dummy->type, NULL);
     $stest = new SuperTest(array("dummy" => "SuperDummy"));
     $stest->save();
     $this->assertEqual(strtolower($stest->type), "supertest");
     $utest = new UltraTest(array("dummy" => "UltraDummy"));
     $utest->save();
     $this->assertEqual(strtolower($utest->type), "ultratest");
     $atest = new AutoTest(array("dummy" => "AutoDummy"));
     $atest->save();
     $this->assertEqual(strtolower($atest->type), "autotest");
     # PHP 5.3 needed to call magic methods statically, so
     # work around by instanciating the class as singleton
     $Test = Singleton::instance("Test");
     # Load and check test entries
     $dummy2 = $Test->find_by_dummy("TestDummy");
     $this->assertEqual($dummy2->type, NULL);
     $this->assertEqual(strtolower(get_class($dummy2)), "test");
     $stest2 = $Test->find_by_dummy("SuperDummy");
     $this->assertEqual(strtolower($stest2->type), "supertest");
     $this->assertEqual(strtolower(get_class($stest2)), "supertest");
     $utest2 = $Test->find_by_dummy("UltraDummy");
     $this->assertEqual(strtolower($utest2->type), "ultratest");
     $this->assertEqual(strtolower(get_class($utest2)), "ultratest");
     $atest2 = $Test->find_by_dummy("AutoDummy");
     $this->assertEqual(strtolower($atest2->type), "autotest");
     $this->assertEqual(strtolower(get_class($atest2)), "autotest");
 }

 static function getInstance()
 {
     if (empty(self::$instance)) {
         self::$instance = new Singleton();
     }
     return self::$instance;
 }

 public static function getInstance()
 {
     if (empty(self::$object)) {
         return self::$object = new Singleton();
     }
     return self::$object;
 }

 public function __construct()
 {
     $this->id = rand(100000, 999999);
     if (is_null(self::$settings)) {
         self::$settings = Singleton::create("Settings");
     }
 }

 public function __construct()
 {
     $this->db = Singleton::create("DatabaseManager");
     if (is_null(self::$dbCache)) {
         self::$dbCache = BeanLocator::get("DatabaseCache");
     }
 }

 public function __construct()
 {
     session_start();
     $this->view = new View(Singleton::getInstance()->r->getController());
     $menu = array();
     if ($this->sesionIniciada()) {
         $this->view->setMsgBienvenida($this->getSesionVar("ROL") . " : " . $this->getSesionVar("NOMBRE") . " " . $this->getSesionVar("APELLIDO"));
         switch ($this->getRol()) {
             case ROL_ADMINISTRADOR:
                 $this->crearMenu($menu, "usuario/consultarUsuarios", 'Usuarios');
                 $this->crearMenu($menu, "preguntas/crearPreguntas", 'Preguntas');
                 $this->crearMenu($menu, "tipoMedicamento/consultarTipoMedicamentos", 'Tipos de Medicamentos');
                 $this->crearMenu($menu, "bodega/consultarBodegas", 'Bodega');
                 $this->crearMenu($menu, "medicamento/consultarMedicamentos", 'Medicamentos');
                 $this->crearMenu($menu, "empresa/consultarEmpresas", 'Empresas');
                 $this->crearMenu($menu, "pedido/consultarPedidos", 'PEDIDOS');
                 break;
             case ROL_REPARTIDOR:
                 $this->crearMenu($menu, "repartidor/consultarPedidosAsignados", 'Pedidos asignados');
                 break;
             case ROL_CLIENTE:
                 $this->crearMenu($menu, "cliente/consultarPedidos", 'PEDIDOS');
                 break;
             default:
                 break;
         }
         $this->crearMenu($menu, "usuario/consultar", 'Consulta de datos');
         $this->crearMenu($menu, "usuario/modificar", 'Modificar datos');
         $this->crearMenu($menu, "usuario/eliminar", 'Eliminar cuenta');
         $this->crearMenu($menu, "usuario/cerrarSesion", 'Cerrar sesión ');
         $this->view->setMenu($menu);
     }
 }

 /**
  * @throws WrongArgumentException
  * @return PrimitiveForm
  * 
  * @deprecated You should use ofProto() instead
  **/
 public function of($className)
 {
     Assert::classExists($className);
     $protoClass = EntityProto::PROTO_CLASS_PREFIX . $className;
     Assert::classExists($protoClass);
     return $this->ofProto(Singleton::getInstance($protoClass));
 }

 /**
  * クラス変数として利用した場合の例
  * @return Singleton
  */
 public static function getInstance()
 {
     if (!isset(self::$_instance)) {
         self::$_instance = new Singleton();
     }
     return self::$_instance;
 }

 public static function GetInstance()
 {
     if (self::$instance == null) {
         self::$instance = new self();
     }
     return self::$instance;
 }

 public static function get_instance()
 {
     if (!self::$instance) {
         self::$instance = new self();
     }
     return self::$instance;
 }