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                namespace Dynamic\DynamicBlocks\Block;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use SheaDawson\Blocks\Model\Block;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use SilverStripe\Control\Controller;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use SilverStripe\Forms\DropdownField;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use SilverStripe\Forms\HTMLEditor\HTMLEditorField;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                if (!class_exists(UserDefinedForm::class)) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    return;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class FormBlock extends Block  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var string  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private static $singular_name = 'Form Block';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var string  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private static $plural_name = 'Form Blocks';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var array  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private static $db = array(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        'Content' => 'HTMLText',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var array  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private static $has_one = array(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        'Form' => 'UserDefinedForm',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return FieldList  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                                                    
                                                                                                        
            
            
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                View Code Duplication | 
                    public function getCMSFields()  | 
            
                            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $fields = singleton(Block::class)->getCMSFields();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if (class_exists('UserDefinedForm')) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $fields->addFieldToTab('Root.Main', DropdownField::create( | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                'FormID',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                'Form',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                UserDefinedForm::get()->map()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                )->setEmptyString('') | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                ->setDescription('select an existing User Defined Form to display') | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $fields->addFieldToTab('Root.Main', HTMLEditorField::create('Content')); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $fields;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return Forms|HTMLText  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function BlockForm()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if ($this->Form()->exists()) { | 
            
                            
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                            $controller = new UserDefinedForm_Controller($this->Form());  | 
            
                            
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                            $current = Controller::curr();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            if ($current && $current->getAction() == 'finished') { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                return $controller->renderWith('ReceivedFormSubmission'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $form = $controller->Form();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            return $form;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param null $member  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param array $context  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return bool  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                     */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public function canCreate($member = NULL, $context = [])  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    { | 
            
            
                                                                        
                            
            
                                    
            
            
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                        if (!class_exists('UserDefinedForm')) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                            return false;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        return parent::canCreate();  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param null $member  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param array $context  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return bool  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function canView($member = NULL, $context = [])  | 
            
                            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if (!class_exists('UserDefinedForm')) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            return false;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return parent::canView();  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                    }  | 
            
            
                                                        
            
                                    
            
            
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                }  | 
            
            
                        
The PSR-1: Basic Coding Standard recommends that a file should either introduce new symbols, that is classes, functions, constants or similar, or have side effects. Side effects are anything that executes logic, like for example printing output, changing ini settings or writing to a file.
The idea behind this recommendation is that merely auto-loading a class should not change the state of an application. It also promotes a cleaner style of programming and makes your code less prone to errors, because the logic is not spread out all over the place.
To learn more about the PSR-1, please see the PHP-FIG site on the PSR-1.