1 | <?php |
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7 | class Base extends ClosedElement |
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8 | { |
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9 | protected function getAllowedAttributes() |
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10 | { |
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11 | $baseAllowedAttributes = array( |
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12 | '/^href$/i' => Element::ATTR_URI, |
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13 | '/^target$/i' => Element::ATTR_CS_STRING |
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14 | ); |
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15 | |||
16 | return array_merge( |
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17 | $baseAllowedAttributes, |
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18 | parent::getAllowedAttributes() |
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19 | ); |
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20 | } |
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21 | |||
22 | public function validate(Configuration $configuration) |
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52 | } |
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53 |
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: