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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace Victoire\Bundle\PageBundle\Controller;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Sensio\Bundle\FrameworkExtraBundle\Configuration\ParamConverter;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Sensio\Bundle\FrameworkExtraBundle\Configuration\Template;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Symfony\Component\HttpFoundation\JsonResponse;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Symfony\Component\HttpFoundation\Request;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Victoire\Bundle\BusinessPageBundle\Form\BusinessPageType;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Victoire\Bundle\PageBundle\Entity\BasePage;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Victoire\Bundle\PageBundle\Entity\Page;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Victoire\Bundle\PageBundle\Form\PageSettingsType;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Victoire\Bundle\PageBundle\Form\PageType;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @Route("/victoire-dcms/page") | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 **/  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class PageController extends BasePageController  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected $routes;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Constructor.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function __construct()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->routes = [  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            'new'       => 'victoire_core_page_new',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            'show'      => 'victoire_core_page_show',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            'settings'  => 'victoire_core_page_settings',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            'detach'    => 'victoire_core_page_detach',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        ];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * New page.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param bool $isHomepage Is the page a homepage  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @Route("/new", name="victoire_core_page_new", defaults={"isHomepage" : false}) | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @Route("/homepage/new", name="victoire_core_homepage_new", defaults={"isHomepage" : true}) | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @Template()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return JsonResponse  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function newAction($isHomepage = false)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return new JsonResponse(parent::newAction($isHomepage));  | 
            
                            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Page settings.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param Request  $request  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param BasePage $page  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @Route("/{id}/settings", name="victoire_core_page_settings") | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @Template()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @ParamConverter("page", class="VictoirePageBundle:BasePage") | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return JsonResponse The settings  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function settingsAction(Request $request, BasePage $page)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return new JsonResponse(parent::settingsAction($request, $page));  | 
            
                            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Page delete.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param BasePage $page  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return JsonResponse  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @Route("/{id}/delete", name="victoire_core_page_delete") | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @Template()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @ParamConverter("page", class="VictoirePageBundle:BasePage") | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function deleteAction(BasePage $page)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return new JsonResponse(parent::deleteAction($page));  | 
            
                            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * getNewPageType.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return string  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                     */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    protected function getNewPageType()  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        return PageType::class;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * getPageSettingsType.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return string  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected function getPageSettingsType()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return PageSettingsType::class;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * getBusinessPageType.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return string  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected function getBusinessPageType()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return BusinessPageType::class;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * getNewPage.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return \Victoire\Bundle\PageBundle\Entity\Page  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected function getNewPage()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return new Page();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * getBaseTemplatePath.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return string  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected function getBaseTemplatePath()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return 'VictoirePageBundle:Page';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * getRoutes.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    137
                 | 
                                    
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                 | 
                     * @param string $action  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    138
                 | 
                                    
                                                     | 
                
                 | 
                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    139
                 | 
                                    
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                 | 
                     * @return string The route  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    140
                 | 
                                    
                                                     | 
                
                 | 
                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    141
                 | 
                                    
                                                     | 
                
                 | 
                    protected function getRoutes($action)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    142
                 | 
                                    
                                                     | 
                
                 | 
                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    143
                 | 
                                    
                                                     | 
                
                 | 
                        return $this->routes[$action];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    144
                 | 
                                    
                                                     | 
                
                 | 
                    }  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
                | 
                    145
                 | 
                                    
                                                     | 
                
                 | 
                }  | 
            
            
                                                        
            
                                    
            
            
                | 
                    146
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                        
If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design.
Let’s take a look at an example:
Our function
my_functionexpects aPostobject, and outputs the author of the post. The base classPostreturns a simple string and outputting a simple string will work just fine. However, the child classBlogPostwhich is a sub-type ofPostinstead decided to return anobject, and is therefore violating the SOLID principles. If aBlogPostwere passed tomy_function, PHP would not complain, but ultimately fail when executing thestrtouppercall in its body.