php - using namespace -

i want use minimal features of phpmailer. folder structure:

webroot/   - php/      - mail.php      - phpmailer/          - phpmailer.php

in mail.php, want use namespace:

<?php use phpmailer\phpmailer; $mail = new phpmailer(true); ...

but got error:

fatal error: class 'phpmailer\phpmailer' not found in /home/example/public_html/php/mail.php on line 2

how can resolve this?

create include.php file.

  $librarypath = "/webroot/php";   set_include_path(get_include_path() . path_separator . $librarypath); ?>

*where $libarypath path of php folder contains phpmailer folder

in phpmailer.php include

    namespace phpmailer;      class phpmailer(){     .....     }     ?>

in mail.php include require can instantiate phpmailer\phpmailer
```
require ('include.php');  use phpmailer\phpmailer; 
```

you can add more class inside php folder , can define namespaces following #2.

you can call them in new pages including 'include.php' , instantiating class.

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