$psr4 and namespace

Hello,

I am trying to use the SVGGraph library from Goat1000 within CodeIgniter and I encountered a problem with the namespaces used by this library.
I use CI 4.4.7 and put the library inside the Libraries folder of my app under app/Libraries/Goat1000/SVGGraph
The SVGGraph library is namespaced and has per default at the beginning of each file the line:
namespace Goat1000\SVGGraph

So, to adapt it to my settings,  I added  the following element to the $psr4 array in the file app/Config/autoload.php
'Goat1000\\SVGGraph' => APPPATH . 'Libraries\Goat1000\SVGGraph'
.

However, I get the following error when I try to instantiate the first class (which is the class SVGGraph):
Class "App\Libraries\Goat1000\SVGGraph\SVGGraph" not found
Clearly, the 'App' namespace doesn't get translated.

I can see that this is the problem, since if I change the namespace line into the SVGGraph Class and put explicitely
namespace App\Libraries\Goat1000\SVGGraph
it works and the class gets loaded.

Since the SVGGraph library contains over 170 files, I do not want to edit each file to change the namespace...
Therefore my questions:
Is this the intended way to use autoload.php? Since I never used namespaces until now I may have misunderstood its function.
Is there another way to achieve my goal, i.e. change the namespace for all classes/files?

Thank you in advance!!
Philippe

Why don't you use Composer to install the library?
It configures autoloader automatically.

But your config in app/Config/autoload.php seems valid.

PHP Code:

'Goat1000\\SVGGraph' => APPPATH . 'Libraries\Goat1000\SVGGraph' 


How do you call the libarary?

ci-phpunit-test | CodeIgniter Testing Guide | CodeIgniter 3 to 4 Upgrade Helper

Why don't you use Composer to install the library?
It configures autoloader automatically.

But your config in app/Config/autoload.php seems valid.

PHP Code:

'Goat1000\\SVGGraph' => APPPATH . 'Libraries\Goat1000\SVGGraph' 


How do you call the libarary?

Thank you for your answer, Kenjis.
Sorry, I forgot to mention that I also tried to install the library with Composer, but it didn't make any change to the autoloader, at least I didn't see any change.

This is my controller with the method where I call the library (just the example given by the author):

Code:

<?php
namespace App\Controllers;
use App\Controllers\BaseController;
use CodeIgniter\Shield\Auth;
use App\Libraries\Goat1000\SVGGraph\autoloader;
use App\Libraries\Goat1000\SVGGraph\SVGGraph;

class Catalogue extends BaseController {
...

public function makeGraph() {
$graph = new SVGGraph(640, 480);
$graph->colours(['red','green','blue']);
$graph->values(100, 200, 150);
$graph->links('/Tom/', '/Dick/', '/Harry/');
$graph->render('BarGraph')
}

Code:

use App\Libraries\Goat1000\SVGGraph\autoloader;
use App\Libraries\Goat1000\SVGGraph\SVGGraph;

The namespace is incorrect.

Code:

use Goat1000\SVGGraph\SVGGraph;

The class "Goat1000\SVGGraph\autoloader" really exists?

ci-phpunit-test | CodeIgniter Testing Guide | CodeIgniter 3 to 4 Upgrade Helper

Hi Kenjis,

As I controlled again everything this morning, after posting my reply, I noticed that I had changed something in the "use" list of my Controller. I changed it and now everything works!!!
I had problems with cache effects from Firefox yesterday and tried quite a lot of combinations, and it seems that in doing this I just remained stuck into the wrong combination...
Sorry about that.
Since I couldn't find any description on how to integrate SVGGraph into CodeIgniter, I'll post a short description as soon as I have tested everything. What is the best place to post it?

If you mean in this forums,
https://forum.codeigniter.com/forumdisplay.php?fid=34

ci-phpunit-test | CodeIgniter Testing Guide | CodeIgniter 3 to 4 Upgrade Helper

Ok, I'll do that
btw. you were right, the code you showed is exactly what I had changed. And yes, the class "Goat1000\SVGGraph\autoloader" really exists.
Thank you for your help!

PHP Code:

// namespace \ back slash            path / forward slash
'InsiteFX\Admin'        => ROOTPATH . 'InsiteFX/Admin',          // InsiteFX/Admin Module 


What did you Try? What did you Get? What did you Expect?

Joined CodeIgniter Community 2009.  ( Skype: insitfx )

I am feeling embarrassed about what I just discovered: Actually it was the composer installation which was working, and the problems I described were caused by my wrong paths in the "use" lines. I said before that the composer installation didn't change anything because I didn't know it has its own autoload file.
Investigating a bit, I saw that Composer just maps all the classes in the file autoload_classmap and I suppose I could do the same in the autoload file from CI. This is not very smart, but it works.
I am old fashioned (started programming in 1974) and do not like tools like Composer which does things I do not control, but I suppose I'll have to live with it.
Thanks to both of you for your support and please accept my apologies for describing a non-existent problem.

Investigating a bit, I saw that Composer just maps all the classes in the file autoload_classmap and I suppose I could do the same in the autoload file from CI. This is not very smart, but it works.

The classmap in autoload_classmap is for optimization by Composer.
Because looking for files from the filesystem takes time.
It is configured in https://github.com/codeigniter4/CodeIgni...r.json#L83

You can define classmap manually in the CI4 autoloader:
https://codeigniter4.github.io/CodeIgnit...l#classmap
But if you use Composer, you don't need to use it.

ci-phpunit-test | CodeIgniter Testing Guide | CodeIgniter 3 to 4 Upgrade Helper