| 1 | <?php |
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| 11 | final class Router implements RouterInterface |
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| 12 | { |
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| 13 | /** |
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| 14 | * @var Dispatcher |
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| 15 | */ |
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| 16 | private $dispatcher; |
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| 17 | |||
| 18 | /** |
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| 19 | * @var RouteInterface[] |
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| 20 | */ |
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| 21 | private $routes; |
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| 22 | |||
| 23 | /** |
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| 24 | * @param RouteInterface[] A collection of routes |
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| 25 | */ |
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| 26 | 15 | public function __construct(array $routes) |
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| 44 | |||
| 45 | /** |
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| 46 | * {@inheritdoc} |
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| 47 | */ |
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| 48 | 12 | public function match($method, $uri) |
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| 66 | } |
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| 67 |
If you define a variable conditionally, it can happen that it is not defined for all execution paths.
Let’s take a look at an example:
In the above example, the variable $x is defined if you pass “foo” or “bar” as argument for $a. However, since the switch statement has no default case statement, if you pass any other value, the variable $x would be undefined.
Available Fixes
Check for existence of the variable explicitly:
Define a default value for the variable:
Add a value for the missing path: