| 1 | <?php |
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| 19 | class Connection |
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| 20 | {
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| 21 | /** |
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| 22 | * @var Stream |
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| 23 | */ |
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| 24 | private $stream; |
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| 25 | |||
| 26 | public function __construct(PromiseInterface $clientPromise) |
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| 35 | |||
| 36 | private function onConnection(Stream $stream) |
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| 42 | |||
| 43 | |||
| 44 | private function processHandshake() |
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| 48 | |||
| 49 | /** |
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| 50 | * @param \Exception|string $error |
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| 51 | */ |
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| 52 | private function onError($error) |
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| 56 | } |
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: