1 | <?php |
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7 | class StaticGraphicRenderer extends AbstractRenderer |
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8 | { |
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9 | /** |
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10 | * @var callable |
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11 | */ |
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12 | protected $graphicResolver; |
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13 | |||
14 | /** |
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15 | * @param callable $graphicResolver |
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16 | */ |
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17 | public function setGraphicResolver(callable $graphicResolver) |
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18 | { |
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19 | $this->graphicResolver = $graphicResolver; |
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20 | } |
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21 | |||
22 | /** |
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23 | * @return callable |
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24 | */ |
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25 | protected function getGraphicResolver() |
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26 | { |
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27 | return $this->graphicResolver; |
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28 | } |
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29 | |||
30 | /** |
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31 | * @return string |
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32 | */ |
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33 | protected function getGraphic() |
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34 | { |
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35 | return $this->parser->getGraphic(); |
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36 | } |
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37 | |||
38 | /** |
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39 | * @return Intervention/Image/Image |
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40 | */ |
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41 | 1 | public function render() |
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49 | } |
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50 |
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: