致命错误说明？

Question

I'm getting this fatal error message:

Fatal error: Can't use method return value in write context in C:\\wamp\\www\\mySite\\application\\controllers\\eventsManager.php on line 115

Could someone tell me what it means?

The line it refers to is this:

$this->session->set_flashdata('alert') = '<ul>'.validation_errors('<li>','</li>').'</ul>';

Answer 1

该行应为：

$this->session->set_flashdata('alert', '<ul>'.validation_errors('<li>','</li>').'</ul>');

Answer 2

From a quick google search, I have gathered that the empty() function may be the culprit. It isn't in your code but it may be in set_flashdata() somewhere. empty() can only check a variable, not the return value of a function. Assign validation_errors('<li>','</li>') to at temp variable and insert the temp var instead.