| 1 | <?php |
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| 11 | class CliCommandPathValidator extends ConstraintValidator |
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| 12 | { |
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| 13 | /** @var string */ |
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| 14 | private $kernelDir; |
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| 15 | |||
| 16 | /** |
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| 17 | * @param string $kernelDir |
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| 18 | */ |
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| 19 | public function __construct($kernelDir) |
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| 23 | |||
| 24 | /** |
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| 25 | * @param string $value The command to check |
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| 26 | * @param Constraint $constraint |
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| 27 | */ |
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| 28 | public function validate($value, Constraint $constraint) |
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| 37 | } |
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| 38 |
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: