thephpleague /
pipeline
| 1 | <?php |
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| 6 | class Fork implements ForkInterface |
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| 7 | { |
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| 8 | /** |
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| 9 | * @var Pipeline |
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| 10 | */ |
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| 11 | private $parent; |
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| 12 | |||
| 13 | /** |
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| 14 | * @var array callable |
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| 15 | */ |
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| 16 | protected $forks = []; |
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| 17 | |||
| 18 | /** |
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| 19 | * @var callable |
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| 20 | */ |
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| 21 | protected $resolver; |
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| 22 | |||
| 23 | /** |
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| 24 | * Fork constructor. |
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| 25 | * |
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| 26 | * @param Pipeline $pipeline |
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| 27 | * @param callable|null $resolver |
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| 28 | */ |
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| 29 | public function __construct(Pipeline $pipeline, callable $resolver = null) |
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| 34 | |||
| 35 | /** |
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| 36 | * @inheritdoc |
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| 37 | */ |
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| 38 | public function join(callable $resolver = null) |
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| 49 | |||
| 50 | /** |
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| 51 | * @inheritdoc |
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| 52 | */ |
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| 53 | public function disjoin($tag, callable $stage = null) |
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| 65 | |||
| 66 | /** |
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| 67 | * Chooses a fork or short-circuits based on $resolver |
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| 68 | * |
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| 69 | * @param mixed $payload |
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| 70 | * @return mixed |
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| 71 | */ |
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| 72 | public function __invoke($payload) |
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| 80 | } |
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| 81 |
Adding an explicit array definition is generally preferable to implicit array definition as it guarantees a stable state of the code.
Let’s take a look at an example:
As you can see in this example, the array
$myArrayis initialized the first time when the foreach loop is entered. You can also see that the value of thebarkey is only written conditionally; thus, its value might result from a previous iteration.This might or might not be intended. To make your intention clear, your code more readible and to avoid accidental bugs, we recommend to add an explicit initialization $myArray = array() either outside or inside the foreach loop.