PHP namespace and include files

Question

I have the following PHP code:

<?php
namespace my_ns;

class dummy
{

function do_print(){echo "printing...";}    
}

$obj_dummy=new dummy();
$obj_dummy->do_print();
?>

This works all fine,

How ever If I put the class in a separate include file (e.g. class.dummy.php), making the code on the page look like below:

<?php
namespace my_ns;
include ("class.dummy.php");
$obj_dummy=new dummy();
$obj_dummy->do_print();
?>

I get the error message:

Class 'my_ns\dummy' not found in ...

How can by default make sure that (all) include-files are automatically added to a given namespace?

Does the class.dummy.php file have the namespace my_ns; line in it? — gen_Eric
– gen_Eric, Commented Feb 24, 2014 at 16:06
Another check would be if $obj_dummy=new \dummy(); works as expected. If it does, your class is in the global namespace. — ɴᴀᴛᴇ ᴅᴇᴠ
– ɴᴀᴛᴇ ᴅᴇᴠ, Commented Feb 24, 2014 at 16:12
@deceze I'm afraid you have to repeat the namespace line in all included files... — Déjà vu
– Déjà vu, Commented Sep 6, 2019 at 7:44

Hanky Panky · Accepted Answer · 2014-02-24 16:13:46Z

7

A file containing a namespace must declare the namespace at the top of the file before any other code - with one exception: the declare keyword.

Source

Add this to your included file as well.

namespace my_ns;

After that, your code works just fine.

Reference

answered Feb 24, 2014 at 16:13

Hanky Panky

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2 Comments

BeNice Over a year ago

Just askin... If a file is to be included in several namespaces is there a work around? I suspect not and I suspect I should stop using so many includes!

Douglas.Sesar Over a year ago

@BeNice - include only once and have use my_ns\dummy; in the other files that you want to use it in.

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