在Classes中使用PHP Slim Framework

Question

I can't seem to get the Slim framework to access functions inside the scope of a PHP class:

<?php

class Controller {
    private $app;

    public function __construct() {
        $this->app = new Slim();

        $this->app->get('/', $this->home);

        $this->app->run();
    }

    public function home() {
        echo 'hi';
    }
}

This causes the following error:

Fatal error: Uncaught exception 'ErrorException' with message 'Undefined property: Controller::$home' in /Users/Oliver/Dropbox/Sites/grapevine/application/controller.php:9 Stack trace: #0 /Users/Oliver/Dropbox/Sites/grapevine/application/controller.php(9): Slim::handleErrors(8, 'Undefined prope...', '/Users/Oliver/D...', 9, Array) #1 /Users/Oliver/Dropbox/Sites/grapevine/public/index.php(14): Controller->__construct() #2 {main} thrown in /Users/Oliver/Dropbox/Sites/grapevine/application/controller.php on line 9

I have tried doing this instead:

$this->app->get('/', $this->home());

But then the routing is ignored, and 'hi' is displayed on every page, not just '/'.

Answer 1

使用成员函数的回调语法：

$this->app->get('/', array($this, 'home'));

Answer 2

以下应该可行（尽管如此，可能需要将home-function更改为静态！）：

$this->app->get('/', "Controller::home");

Answer 3

I have this solution with constructor injection from Slim internal container

Basically the main magic is hidden in __call function

class App extends Slim
 public function __call($name, $params) {
  return function () use ($name, $params) {
  list($class, $action) = explode('_', $name . '_handle'); // default method is handle

  $args = [];
  $class = new \ReflectionClass($class);
  $constructor = $class->getConstructor();
  foreach ($constructor->getParameters() as $param) {
   $args[] = ($param->name === 'app') ? $this : $this->container->get($param->name);
  }
  $controller = $class->newInstanceArgs($args);
  return call_user_func([$controller, $action], func_get_args() + $params);
  };
 }
}

controller need to have App in constructor params:

class Homepage {

 public $app;

 public function __construct(\App $app) {
  $this->app = $app;
 }
}

And index.php have just router settings

$app = new \App();
$app->get('/', $app->Homepage());
$app->run(

See whole code here https://gist.github.com/OzzyCzech/7230064