1 | <?php |
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14 | class HtmlIconGroups extends HtmlSemCollection { |
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15 | |||
16 | public function __construct($identifier, $icons=array(), $size="") { |
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21 | |||
22 | protected function createItem($value) { |
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34 | |||
35 | protected function createCondition($value) { |
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38 | |||
39 | public function getIcon($index) { |
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42 | |||
43 | public function toCorner($index=1) { |
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47 | } |
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: