PHP: Namespaces in a single file with a global namespace

Question

I have a file that require()'s a namespace, as such:

<?php
require_once('Beer.php');   // This file contains the Beer namespace

$foo = new Beer\Carlsburg();
?>

I would like to put the Beer namespace directly in the same file, like this (unworking) example:

<?php
namespace Beer {
    class Carlsburg {}
}

$foo = new Beer\Carlsburg();
?>

However, the PHP interpreter complains that No code may exist outside of namespace. I can therefore wrap $foo declaration in a namespace, but then I must also wrap Beer in that namespace to access it! Here is a working example of what I am trying to avoid:

<?php
namespace Main\Beer {
    class Carlsburg {}
}

namespace Main {
    $foo = new Beer\Carlsburg();
}
?>

Is there any way to include the code for the Beer namespace in the file, yet not wrap the $foo declaration in its own namespace (leave it in the global namespace)?

Thanks.

You should have Heineken as namespace!

Marko
– Marko

2014-06-04 19:58:56 +00:00
Commented Jun 4, 2014 at 19:58 — Marko
– Marko, Commented Jun 4, 2014 at 19:58

Manse · Accepted Answer · 2012-02-14 09:35:14Z

21

You should use the global namespace :

<?php
namespace Beer {
    class Carlsburg {}
}


namespace { // global code
    $foo = new Beer\Carlsburg();
}
?>

See here -> http://php.net/manual/en/language.namespaces.definitionmultiple.php

edited Feb 14, 2012 at 9:35

answered Feb 14, 2012 at 9:28

Manse

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1 Comment

Dmitry Kudryavtsev Over a year ago

This wont work unless you write $foo = new Main\Beer\Carlsburg();

Dmitry Kudryavtsev · Accepted Answer · 2012-02-14 09:29:07Z

4

Try this

namespace Beer {
  class Carlsburg {}
}

//global scope 
namespace {
  $foo = new Beer\Carlsburg();
}

As per example #3 in Defining multiple namespaces in the same file

answered Feb 14, 2012 at 9:29

Dmitry Kudryavtsev

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Comments

mingos · Accepted Answer · 2012-02-14 09:28:12Z

3

Try placing a backslash before the namespace name:

$beer = new \Beer\Carlsberg();

The initial backslash is translated to "global namespace". If you do not put the leading backslash, the class name is translated to the current namespace.

answered Feb 14, 2012 at 9:28

mingos

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Comments

hakre · Accepted Answer · 2012-02-14 09:28:58Z

3

Just write it, it has no "name":

<?php
namespace Main\Beer {
    class Carlsburg {}
}

namespace {
    use Main\Beer;
    $foo = new Beer\Carlsburg();
}
?>

Demo and see Defining multiple namespaces in the same file^Docs.

answered Feb 14, 2012 at 9:28

hakre

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