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                <?php  | 
            
                            
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                namespace DNADesign\Elemental\Tests\Behat\Context;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use DNADesign\Elemental\Extensions\ElementalAreasExtension;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use DNADesign\Elemental\Extensions\ElementalPageExtension;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use DNADesign\Elemental\Models\BaseElement;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use DNADesign\Elemental\Models\ElementContent;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use SilverStripe\BehatExtension\Context\FixtureContext as BaseFixtureContext;  | 
            
                            
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                use SilverStripe\BehatExtension\Utility\StepHelper;  | 
            
                            
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                use SilverStripe\Core\ClassInfo;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use SilverStripe\Core\Extensible;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use SilverStripe\Core\Injector\Injector;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use SilverStripe\Dev\FixtureBlueprint;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use SilverStripe\ORM\DB;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use SilverStripe\ORM\HasManyList;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                if (!class_exists(BaseFixtureContext::class)) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    return;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * Context used to create fixtures in the SilverStripe ORM.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class FixtureContext extends BaseFixtureContext  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    use StepHelper;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected function scaffoldDefaultFixtureFactory()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $factory = parent::scaffoldDefaultFixtureFactory();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        foreach (ClassInfo::subclassesFor(BaseElement::class) as $class) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $blueprint = Injector::inst()->create(FixtureBlueprint::class, $class);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $factory->define($class, $blueprint);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $factory;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Create a page cothe "Blocks Page" :type has a "Block Title" content element with "Sample content" content  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @Given the :pageTitle :type has a :elementTitle content element with :elementContent content  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param string $pageTitle  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param string $type  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param string $elementTitle  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param string $elementContent  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                     */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public function theHasAContentElementWithContent($pageTitle, $type, $elementTitle, $elementContent)  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    { | 
            
            
                                                                        
                            
            
                                    
            
            
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                        // Create the page (ElementalArea is created on write and attached to it)  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $targetClass = $this->convertTypeToClass($type);  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $page = $this->getFixtureFactory()->get($targetClass, $pageTitle);  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        if (!$page) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                            $page = $this->getFixtureFactory()->createObject($targetClass, $pageTitle);  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        // Ensure that an ElementalArea is created (see ElementalAreasExtension)  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $page->write();  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        // Create the element and assign it to the page's ElementalArea  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $element = $this->getFixtureFactory()->createObject(ElementContent::class, $elementTitle);  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $element->ParentID = $page->ElementalAreaID;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $element->Content = $elementContent;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $element->write();  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $page->ElementalArea()->write();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @Given I add an extension :extension to the :class class  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function iAddAnExtensionToTheClass($extension, $class)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $targetClass = $this->convertTypeToClass($class);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $targetClass::add_extension(ElementalPageExtension::class);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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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.