Global function vs vs static class

Question

Let's say you have an object that is unique, and it is used by all other classes and functions ... something like $application.

How could you access this object in your functions?

• using a global variable in each of your functions:

  global $application;
  $application->doStuff();
  

• creating a function, for example application(), that creates an object in a static variable and returns it; then use this function wherever you need to access the object:

  application()->doStuff();
  

• create a singleton thing, such as a static method inside the class of the object that returns a single instance, and use this method to access the object:

  Application::getInstance()->doStuff();
  

• KingCrunch and skwee: pass the application object as an argument to each function / class where necessary

  ...
  public function __construct(Application $app, ...){
    ....
  

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Answer 1

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function doFoo(Application $app) {
    $app->doStuff();
}

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class Context {
    public $application;
    public $logger;
    ....
}
========
$context = new Context();
$context->application = new Application();
$context->logger = new Logger(...);
doFoo($context);
========
function doFoo(Context $context) {
    $context->application->doStuff();
    $context->logger->logThings();
}

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Answer 2

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Answer 3

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