1 | <?php |
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5 | class Rover |
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6 | { |
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7 | private $map; |
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8 | private $position; |
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9 | private $orientation; |
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10 | private $collissions; |
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11 | |||
12 | 2 | public function __construct(Map $a_map, Position $a_position, Orientation $an_orientation) |
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20 | |||
21 | 2 | public function commands(string ...$movements): void |
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28 | |||
29 | 2 | private function move(string $movement_string): void |
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59 | |||
60 | 2 | private static function validate(): void |
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64 | |||
65 | 2 | public function position(): Position |
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69 | |||
70 | /** @return Position[] */ |
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71 | public function detectedCollisions(): array |
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80 | } |
PHP Analyzer performs a side-effects analysis of your code. A side-effect is basically anything that might be visible after the scope of the method is left.
Let’s take a look at an example:
If we look at the
getEmail()
method, we can see that it has no side-effect. Whether you call this method or not, no future calls to other methods are affected by this. As such code as the following is useless:On the hand, if we look at the
setEmail()
, this method _has_ side-effects. In the following case, we could not remove the method call: