Meaning of "Can't use method return value in write context"
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Can't use method return value in write context
I sometimes encountered this error Can't use method return value in write context . However, I don't know what does WRITE CONTEXT means in this sentence. Could someone tell me a little general explaination of it.
Thank you.
The code for this error if you want to refer to is on line if(empty($this->loadUser())) However just to clarify, I just want to find out the meaning of "write context":
public function verify()
{
if(empty($this->loadUser()))
$this->addError('username','Incorrect username.');
else
{
$user = $this->loadUser();
$project = $this->loadProject($pid);
$project->associateUserToProject($this->loadUser());
$project->associateUserToRole($this->role, $this->user->id)
}
}
public function loadUser() {
return User::model()->findByAttributes(array('username'=>$this->username));
}
empty () is not a function really. It is a construct or macros, if you please. It means you cannot pass an object to it as argument. Just pure variables.
$is_use = $this->loadUser();
if (empty ($is_use))
{
...
}
empty only takes variables as an arg. empty() only checks variables as anything else will result in a parse error.
http://php.net/manual/en/function.empty.php
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