1 | <?php |
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11 | class CpuPerformance implements CheckInterface |
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12 | { |
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13 | /** |
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14 | * @var CheckInterface |
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15 | */ |
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16 | private $check; |
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17 | |||
18 | public function __construct(array $config = []) |
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29 | |||
30 | public function check(): ResultInterface |
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34 | |||
35 | public function getLabel(): string |
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39 | |||
40 | public function setLabel(string $label): void |
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44 | } |
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45 |
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: