CODEWITHSUNDEEP
phpnamespaces
Woppi
Woppi

Reputation: 5431

What does this PHP namespace code block mean?

I currently encountered this namespace code block during code review that I looks something like this. I'm new to namespaces and examples I've seen in youtube and tutorials have no similar example.

I only understand the first namespace means the code block will be on global space. But what does the second namespace exactly mean?

namespace
{
     class Logging{} 
}

namespace Admin\Logging
{
      class Logged_in
      {
          public function __construct()
          {
                /* some code here */
          }
      }

      /* other classes here */
}

Thank you for your help.

Upvotes: 2

Views: 298

Answers (3)

Woppi
Woppi

Reputation: 5431

To answer my own question, hope I got this right...

In layman's term, Admin\Logging means "where can I find this file"

|--admin
|  |-- Logging.php

and that 

namespace
{
    class Logging {}
}

because both namespace are in the same file, it can serve as a library and be autoloaded...

Wew... I'm not really technical but that's how I understand it..... thanks all for your help.

Thanks to: http://www.mwop.net/blog/254-Why-PHP-Namespaces-Matter.html

Upvotes: 0

didierc
didierc

Reputation: 14730

The syntax for namespaces is similar to directory hierarchy: backslashes (\) act as separators for subnamespaces.

Therefore the second notation indicates the definition of the Admin namespace, and of the Logging namespace within it.

See the documentation for more information.

Upvotes: 0

Ja͢ck
Ja͢ck

Reputation: 173552

The second declaration is a sub namespace or nested namespace.

In your example, the class Logged_in would have the canonical name of \Admin\Logging\Logged_in

Upvotes: 1

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