CakePHP - 无法在视图中获取会话变量

Question

In ProjectsController.php I'm setting a session variable as I'd like that info to be accessible in ALL controllers, models and views:

$this->Session->write('Project.title', $this->Project->title);

Now, when I try access it from Projects view, like this:

        <p>Project: <strong>
        <?php if (isset($session->read('Project.title'))): 
            $session->read('Project.title');
        ?>
        <?php else: ?>
            Not selected
        <?php endif; ?>
        </strong></p>       

I'm getting the following error:

Fatal error: Can't use method return value in write context 

Which refers to the second line of above code.

I've been through CakePHP documentation and also searched SO, what am I doing wrong here?

Thanks!

EDIT:

I've also tried using:

$this->Session->read('Project.title')

resulting in the same error message.

Answer 1

You should do what PHP tells you once in a while :) The error message is pretty clear. You cannot use isset() and empty() this way. They only work with variables direcly, not methods. So use

<?php if ($this->Session->check('Project.title')) {
    echo $this->Session->read('Project.title');
} ?>

as documented in the cookbook

you could also do

<?php
$title = $this->Session->read('Project.title');
if ($title) {
    echo $title;
} ?>

or even

<?php if ($title = $this->Session->read('Project.title')) {
    echo $title;
} ?>

the last one is not cakephp coding convention, though.