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: