thinkPHP基于反射实现钩子的方法分析

<?phpclass BlogAction {  public function detail() {    echo 'detail' . "/r/n";  }  public function test($year = 2014, $month = 4, $day = 21) {    echo $year . '--' . $month . '--' . $day . "/r/n";  }  public function _before_detail() {    echo __FUNCTION__ . "/r/n";  }  public function _after_detail() {    echo __FUNCTION__ . "/r/n";  }}// 执行detail方法$method = new ReflectionMethod('BlogAction', 'detail');$instance = new BlogAction();// 进行权限判断if ($method->isPublic()) {  $class = new ReflectionClass('BlogAction');  // 执行前置方法  if ($class->hasMethod('_before_detail')) {    $beforeMethod = $class->getMethod('_before_detail');    if ($beforeMethod->isPublic()) {      $beforeMethod->invoke($instance);    }  }  $method->invoke(new BlogAction);  // 执行后置方法  if ($class->hasMethod('_after_detail')) {    $beforeMethod = $class->getMethod('_after_detail');    if ($beforeMethod->isPublic()) {      $beforeMethod->invoke($instance);    }  }}// 执行带参数的方法$method = new ReflectionMethod('BlogAction', 'test');$params = $method->getParameters();foreach ($params as $param) {  $paramName = $param->getName();  if (isset($_REQUEST[$paramName])) {    $args[] = $_REQUEST[$paramName];  } elseif ($param->isDefaultValueAvailable()) {    $args[] = $param->getDefaultValue();  }}if (count($args) == $method->getNumberOfParameters()) {  $method->invokeArgs($instance, $args);} else {  echo 'parameters is wrong!';}

/** * 执行App控制器 */public function execApp() {  // 创建action控制器实例  $className = MODULE_NAME . 'Controller';  $namespaceClassName = '//apps//' . APP_NAME . '//controller//' . $className;  load_class($namespaceClassName, false);  if (!class_exists($namespaceClassName)) {    throw new /Exception('Oops! Module not found : ' . $namespaceClassName);  }  $controller = new $namespaceClassName();  // 获取当前操作名  $action = ACTION_NAME;  // 执行当前操作  //call_user_func(array(&$controller, $action)); // 其实吧，用这个函数足够啦！！！  try {    $methodInfo = new /ReflectionMethod($namespaceClassName, $action);    if ($methodInfo->isPublic() && !$methodInfo->isStatic()) {      $methodInfo->invoke($controller);    } else { // 操作方法不是public类型，抛出异常      throw new /ReflectionException();    }  } catch (/ReflectionException $e) {    // 方法调用发生异常后，引导到__call方法处理    $methodInfo = new /ReflectionMethod($namespaceClassName, '__call');    $methodInfo->invokeArgs($controller, array($action, ''));  }  return;}