1 | <?php |
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10 | abstract class AbstractRequest implements RequestInterface |
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11 | { |
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12 | /** |
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13 | * @var int |
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14 | */ |
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15 | private $activity = Activity::WEB_REQUEST; |
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16 | |||
17 | /** |
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18 | * @var \DateTime |
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19 | */ |
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20 | private $date = null; |
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21 | |||
22 | /** |
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23 | * @var bool |
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24 | */ |
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25 | private $showCountry = false; |
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26 | |||
27 | /** |
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28 | * @param int $activity |
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29 | * |
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30 | * @return $this |
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31 | */ |
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32 | public function setActivity($activity) |
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33 | { |
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34 | $this->activity = $activity; |
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35 | |||
36 | return $this; |
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37 | } |
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38 | |||
39 | /** |
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40 | * @param \DateTime|null $date |
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41 | * |
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42 | * @return $this |
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43 | */ |
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44 | final public function setDate(\DateTime $date = null) |
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45 | { |
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46 | $this->date = $date; |
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47 | |||
48 | return $this; |
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49 | } |
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50 | |||
51 | /** |
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52 | * @param bool $showCountry |
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53 | */ |
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54 | public function setShowCountry($showCountry) |
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58 | |||
59 | /** |
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60 | * {@inheritdoc} |
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61 | */ |
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62 | public function getParameters() |
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82 | } |
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83 |
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: