Using 'use' in included php files

Question

So I have a config.php file with the following:

use PHPOnCouch\Couch;
use PHPOnCouch\CouchAdmin;
use PHPOnCouch\CouchClient;

Then I have another file called let's say index.php that includes config.php

require_once("config.php");
include("page.php");

And then I have page.php that uses CouchClient like so:

$client = new couchClient ($URL, $DB);

But on page.php, I get the following error:

Fatal error: Class 'couchClient' not found in page.php

Shouldn't this page be connected to my config.php so that I don't have to put this in my page.php?

You need to add `use` in the file that is going to use those classes. The `use`-statements are not inherited.. — M. Eriksson, Nov 15 '16 at 16:40
Okay thanks @MagnusEriksson - was hoping there was a way to make them inherited. — bryan, Nov 15 '16 at 16:41
please refer this question http://stackoverflow.com/questions/10965454/how-does-the-keyword-use-work-in-php-and-can-i-import-classes-with-it — Sarath Kumar, Nov 15 '16 at 16:43
No. If they were, it would be a mess, since you would have a lot of "you can't re-declare class xxx" and so on. — M. Eriksson, Nov 15 '16 at 16:44

JustOnUnderMillions · Answer 1 · 2016-11-15T17:04:37.727

Do in page.php:

$client = new \PHPOnCouch\CouchClient ($URL, $DB);

or

use PHPOnCouch\CouchClient;
$client = new CouchClient ($URL, $DB);

this also works

use PHPOnCouch\CouchClient as SomeOtherFunnyName;
$client = new SomeOtherFunnyName ($URL, $DB);

and read more about namespaces in php.

Little update to:

Shouldn't this page be connected to my config.php so that I don't have to put this in my page.php?

Every include has its own local namesless namespace or one/more named namespaces!
If no namespace is given, you have a namesless namespace. In other word you can always use namespace { /*code*/ } in a php script
If you are in a namespace , you have to include via use all needed classes. And because all files have its own namespace, you have to include it via use
The notation of namespaces in this way: namespace xyz; with no braces, is for files that holding only one namespace!

A simple exmaple (just one file):

    namespace a {
      class a {}
    }
    namespace b {
      use a\a;
      class b extends a{}
    }
    namespace {
      use a\a;
      use b\b;
      new a;
      new b;
    }

lets say the last namespace isnt given, and we include this in an new file, we can do

    namespace mynamespace;
    use a\a;
    use b\b as x;
    new a;
    new x;

Using 'use' in included php files

1 Answers1