Php constant() not working with namespace?

Question

The following does not work:

use application\components\auditor\AuditLevel;


public function actionAudit()
{
    $data=unserialize($_POST['data']);
    $message=$data['message'];
    $context=$data['context'];
    $level=$context['level'];
    Yii::app()->auditor->log(constant('AuditLevel::'.$level), $message, $context);
}

// constant(): Couldn't find constant AuditLevel::INFO

But having all namespace works:

use application\components\auditor\AuditLevel;


public function actionAudit()
{
    $data=unserialize($_POST['data']);
    $message=$data['message'];
    $context=$data['context'];
    $level=$context['level'];
    Yii::app()->auditor->log(constant('application\components\auditor\AuditLevel::'.$level), $message, $context);
}

Any idea how can I use the namespace declared above instead of in the function?

Thanks!

Community · Accepted Answer · 2023-11-17 20:33:26Z

2

From the php.net comment section on constant():

As of PHP 5.4.6 constant() pays no attention to any namespace aliases that might be defined in the file in which it's used. I.e. constant() always behaves as if it is called from the global namespace.

You have to use the full namespace path.

edited Nov 17, 2023 at 20:33

CommunityBot

11 silver badge

answered Jan 6, 2014 at 15:11

jszobody

29k6 gold badges66 silver badges76 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

deceze · Accepted Answer · 2014-01-06 15:15:31Z

2

All class names passed as string are "immune" to the current namespace and aliases, they are all fully qualified names, always. Whether you're instantiating a new class by variable or resolve a constant by string name, you always need to use the FQN. It's only practical: strings can be passed from one namespace to another, it's impossible to create clear resolution rules for them.

answered Jan 6, 2014 at 15:15

deceze♦

525k89 gold badges807 silver badges954 bronze badges

Comments

moonwave99 · Accepted Answer · 2014-01-06 15:12:03Z

1

You can use the __NAMESPACE__ keyword.

Yii::app()->auditor->log(constant(__NAMESPACE__ . '\AuditLevel::'.$level), $message, $context);

Of course this will work just in the same namespace - otherwise you need to provide full path [which sounds reasonable to me].

answered Jan 6, 2014 at 15:12

moonwave99

22.9k3 gold badges49 silver badges71 bronze badges

Collectives™ on Stack Overflow

Php constant() not working with namespace?

3 Answers 3

Comments

Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related