How can i define global variables in slim framework - php

Question

How can i define a global variable such that my current_user method can work were ever i want it to, all i simple need to do is check if there is a current user my example code is below
if (isset($_SESSION['company_id'])) {
$current_user = Companies::find($_SESSION['company_id']);
}
else
{
$current_company = null;
}
how can i use the current user method where ever i want without passing it to my app->render() method just like in my header.html
{% if current_user %}
hi {{current_user.name}}
{% endif %}

Answer 1

You can inject a value into the app object:
$app->foo = 'bar';
More on Slim’s documentation.

Answer 2

Injection is not working in the callback function.
To have access to the variable in a callback function you can use "use() " function :
$mydata = array ( ... );
$app->get('/api', function(Request $request, Response $response) use($mydata) {
echo json_encode($mydata);
});

Answer 3

Inject the object it like this:
$app->companies = new Companies();
You can also inject it as a singleton if you want to make sure its the same one each time:
$app->container->singleton('companies', function (){
return new Companies();
});
The call it like this:
$app->companies->find($_SESSION['company_id']);
UPDATE DOC LINK:
Slim Dependency Injection

Answer 4

The accepted answer does not work for Slim 3 (as the hooks have been removed).
If you are trying to define a variable for all views and you are using the PhpRenderer, you can follow their example:
// via the constructor
$templateVariables = [
"title" => "Title"
];
$phpView = new PhpRenderer("./path/to/templates", $templateVariables);
// or setter
$phpView->setAttributes($templateVariables);
// or individually
$phpView->addAttribute($key, $value);

Answer 5

i was finally able to get it to work with this
$app->hook('slim.before.dispatch', function() use ($app) {
$current_company = null;
if (isset($_SESSION['company_id'])) {
$current_company = Company::find($_SESSION['company_id']);
}
$app->view()->setData('current_company', $current_company);
});

Answer 6

With twig/view
creating a middleware
<?php
namespace ETA\Middleware;
class GlobalVariableMiddleware extends Middleware {
public function __invoke($request, $response, $next) {
$current_path = $request->getUri()->getPath();
$this->container->view->getEnvironment()->addGlobal('current_path', $current_path);
return $next($request, $response);
}
}