1 | <?php |
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22 | class NoneSource implements Component |
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23 | { |
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24 | /** |
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25 | * {@inheritdoc} |
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26 | */ |
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27 | public function name(): string |
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31 | |||
32 | /** |
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33 | * {@inheritdoc} |
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34 | */ |
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35 | public function load(array $configs, ContainerBuilder $container) |
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42 | |||
43 | /** |
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44 | * {@inheritdoc} |
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45 | */ |
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46 | public function getNodeDefinition(NodeDefinition $node) |
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54 | |||
55 | /** |
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56 | * {@inheritdoc} |
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57 | */ |
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58 | public function prepend(ContainerBuilder $container, array $config): array |
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63 | } |
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64 |
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 sub-classes 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 parent class: