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: