| 1 | <?php |
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| 25 | class QuoteManager extends AbstractManager { |
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| 26 | |||
| 27 | /** |
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| 28 | * Service name. |
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| 29 | * |
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| 30 | * @var string |
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| 31 | */ |
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| 32 | const SERVICE_NAME = "webeweb.core.manager.quote"; |
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| 33 | |||
| 34 | /** |
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| 35 | * {@inheritDoc} |
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| 36 | */ |
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| 37 | public function addProvider(ProviderInterface $provider) { |
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| 43 | |||
| 44 | /** |
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| 45 | * {@inheritDoc} |
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| 46 | */ |
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| 47 | public function contains(ProviderInterface $provider) { |
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| 59 | } |
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| 60 |
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: