PHP adding custom namespace using autoloader from composer

Question

Here is my folder structure:

Classes
  - CronJobs
    - Weather
      - WeatherSite.php

I want to load WeatherSite class from my script. Im using composer with autoload:

$loader = include(LIBRARY .'autoload.php');
$loader->add('Classes\Weather',CLASSES .'cronjobs/weather');
$weather = new Classes\Weather\WeatherSite();

Im assuming the above code is adding the namespace and the path that namespace resolves to. But when the page loads I always get this error:

 Fatal error: Class 'Classes\Weather\WeatherSite' not found

Here is my WeatherSite.php file:

namespace Classes\Weather;

class WeatherSite {

    public function __construct()
    {

    }

    public function findWeatherSites()
    {

    }

}

What am I doing wrong?

You actually don't need custom autoloader, you probably can use PSR-4. Do you use composer.json? If so, could you add it's content in autoload section? — Tomas Votruba
– Tomas Votruba, Commented Jul 19, 2015 at 19:20
@Tomáš Votruba I thought for custom classes I write I would have to add the namespaces to the autoloader script that comes with composer? — John
– John, Commented Jul 19, 2015 at 19:22

Tomas Votruba · Accepted Answer · 2021-02-04 12:16:17Z

69

You actually don't need custom autoloader, you can use PSR-4.

Update your autoload section in composer.json:

"autoload": {
    "psr-4": {
        "Classes\\Weather\\": "Classes/CronJobs/Weather"
    }
}

To explain: it's {"Namespace\\\": "directory to be found in"}

Don't forget to run composer dump-autoload to update Composer cache.

Then you can use it like this:

include(LIBRARY .'autoload.php');

$weather = new Classes\Weather\WeatherSite();

edited Feb 4, 2021 at 12:16

answered Jul 19, 2015 at 19:22

Tomas Votruba

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7 Comments

John Over a year ago

Thank you, but how do I reference the name space in the script then? Do I still need to add Namespace Classes to the top of my custom class file, WeatherSite.php? And in the script that calls the class is it just $site_weather = new Classes\Weather\SiteWeather()?

John Over a year ago

Nevermind, I got it to work, but only if the namespace in composer points to the sub directory that the php file is in. So if composer I have it Classes => class/CronJobs then in the script $weather = new Classes\Weather\WeatherSite(); I still get the error, but if I update composer to Classes => class/CronJobs/Weather it now works. Any idea what Im still doing wrong?

John Over a year ago

Ok looks like I figured that out. In the WeatherSite.php file I changed it from namespace Classes to namespace Classes\Weather and now it works. Thank you for all your help. Can you confirm this is the correct way of doing something like this? Or is this a bad "design"?

Tomas Votruba Over a year ago

Sorry, I've fixed my answer accordingly. Have you tried the composer.json way? That's the correct one. Using $loader is bad practice.

mmw5610 Over a year ago

'composer dump-autoload' doesnt work for me but 'php artisan optimize' work for me .

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