助手在视图中不可用
Helper not available in the view
我正在从 1.3 迁移到 2.0.6，遇到以下问题：
Notice (8): Undefined variable: session [APP/View/Users/login.ctp, line 2]
Fatal error: Call to a member function flash() on a non-object in login.ctp on line 2
为什么访问会话助手时出现问题？
这不是使用助手的方法
Notice (8): Undefined variable: session [APP/View/Users/login.ctp, line 2]
Fatal error: Call to a member function flash() on a non-object in login.ctp
虽然它不在问题中，但您的 login.ctp 模板看起来像这样：
<?php
echo $session>flash(); # line 2
那是不是 how helpers are expected to be used in CakePHP 2.x:
you can use [the helper] in your views by accessing an object named after the
helper:
<!-- make a link using the new helper -->
<?php echo $this->Link->makeEdit('Change this Recipe', '/recipes/edit/5'); ?>
您要查找的代码是：
# echo $session->flash(); # wrong
echo $this->Session->flash(); # right
另请注意，Session 需要在 controller $helpers array 中。
在 1.2 和更早版本的 CakePHP 中，帮助器应该是变量，this changed but was still supported in 1.3. If your 1.3 CakePHP application has been using helpers in this way, it has been relying on backwards-compatibility with earlier versions. In 2.0 helpers are not variables, and only possible to access as a view class property. Be sure to read the migration guides - 有关更改内容的更多信息。
我正在从 1.3 迁移到 2.0.6，遇到以下问题：
Notice (8): Undefined variable: session [APP/View/Users/login.ctp, line 2]
Fatal error: Call to a member function flash() on a non-object in login.ctp on line 2
为什么访问会话助手时出现问题？
这不是使用助手的方法
Notice (8): Undefined variable: session [APP/View/Users/login.ctp, line 2]
Fatal error: Call to a member function flash() on a non-object in login.ctp
虽然它不在问题中，但您的 login.ctp 模板看起来像这样：
<?php
echo $session>flash(); # line 2
那是不是 how helpers are expected to be used in CakePHP 2.x:
you can use [the helper] in your views by accessing an object named after the helper:
<!-- make a link using the new helper --> <?php echo $this->Link->makeEdit('Change this Recipe', '/recipes/edit/5'); ?>
您要查找的代码是：
# echo $session->flash(); # wrong
echo $this->Session->flash(); # right
另请注意，Session 需要在 controller $helpers array 中。
在 1.2 和更早版本的 CakePHP 中，帮助器应该是变量，this changed but was still supported in 1.3. If your 1.3 CakePHP application has been using helpers in this way, it has been relying on backwards-compatibility with earlier versions. In 2.0 helpers are not variables, and only possible to access as a view class property. Be sure to read the migration guides - 有关更改内容的更多信息。