Routing HTTP requests to static class methods - php

Question

I just started using Slim Framework to create my rest API. Everything works well until I try to route HTTP request to a static class method (I used the anonymous function before). Below is my new route code on index.php:
include "vendor/autoload.php";
$config = ['settings' => [
'addContentLengthHeader' => false,
'displayErrorDetails' => true,
'determineRouteBeforeAppMiddleware' => true
]
];
$app = new \Slim\App($config);
$app->get('/user/test', '\App\Controllers\UserController:test');
$app->run();
And below is my UserController class on UserController.php
class UserController{
public function test($request, $response, $args){
$array = ['message'=>'your route works well'];
return $response->withStatus(STAT_SUCCESS)
->withJson($array);
}
}
Error details:
Type : RuntimeException
Message: Callable \Controllers\UserController does not exist
File : /var/www/html/project_api/vendor/slim/slim/Slim/CallableResolver.php
Below is my project folder tree
project_api/
index.php
vendor/
slim/slim/Slim/CallableResolver.php
Controllers/
UserController.php
my composer.json
{
"require": {
"slim/slim": "^3.8",
"sergeytsalkov/meekrodb": "*",
"slim/http-cache": "^0.3.0"
}
},
"autoload": {
"psr-4": {
"Controllers\\": "Controllers/"
}
}

Answer 1

It seems that your namespace is define improperly. In your composer.json, class UserController under the namespace Controllers.
you should define a namespace at the top of your UserController.php:
namespace Controllers;
and change $app->get() in your index.php to:
$app->get('/user/test', 'Controllers\UserController:test');