1 | <?php |
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23 | final class RequestListener |
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24 | { |
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25 | /** |
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26 | * @var ThemeRepositoryInterface |
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27 | */ |
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28 | private $themeRepository; |
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29 | |||
30 | /** |
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31 | * @var ThemeContextInterface |
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32 | */ |
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33 | private $themeContext; |
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34 | |||
35 | /** |
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36 | * @param ThemeRepositoryInterface $themeRepository |
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37 | * @param SettableThemeContext $themeContext |
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38 | */ |
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39 | public function __construct(ThemeRepositoryInterface $themeRepository, SettableThemeContext $themeContext) |
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44 | |||
45 | /** |
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46 | * @param GetResponseEvent $event |
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47 | */ |
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48 | public function onKernelRequest(GetResponseEvent $event) |
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57 | } |
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58 |
Let’s take a look at an example:
In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different implementation of User which does not have a getDisplayName() method, the code will break.
Available Fixes
Change the type-hint for the parameter:
Add an additional type-check:
Add the method to the interface: