ReflectionUnionType::getTypes

(PHP 8)

ReflectionUnionType::getTypes — union 型に含まれる型を返す。

説明

public ReflectionUnionType::getTypes(): array

union 型に含まれるリフレクションの型を返します。

パラメータ

この関数にはパラメータはありません。

戻り値

ReflectionType オブジェクトの配列を返します。

例

例1 ReflectionUnionType::getTypes() の例

<?php
function someFunction(int|float $number) {}

$reflectionFunc = new ReflectionFunction('someFunction');
$reflectionParam = $reflectionFunc->getParameters()[0];

var_dump($reflectionParam->getType()->getTypes());

上の例の出力は、たとえば以下のようになります。

array(2) {
    [0] =>
    class ReflectionNamedType#4(0) {
    }
    [1] =>
    class ReflectionNamedType#5(0) {
    }
}

参考

ReflectionType::allowsNull() - null が許されるかをチェックする
ReflectionParameter::getType() - 引数の型を取得する

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User Contributed Notes 2 notes

down

baptiste at pillot dot fr ¶

1 year ago

Sorting :

Contrary to what one might expect, the returned array of ReflectionType objects will not be sorted in the same order than the types declared into the source code.

- Classes, interfaces, traits, iterable (replaced by Traversable), ReflectionIntersectionType objects, parent and self: these types will be returned first, in the order in which they were declared.
- static and all built-in types (iterable replaced by array) will come next. They will always be returned in this order: static, callable, array, string, int, float, bool (or false or true), null.

Notice that when used into an union type, iterable is an alias for Traversable|array. ReflectionUnionType::getTypes will return these both ReflectionNamedType objects, instead of a single one named 'iterable'.

Example :
<?php
class PC {}
class C extends PC {
    function f(): null|bool|float|int|parent|PC|string|iterable|(ReflectionClass&ReflectionProperty)|callable|static|self|C {}
}
echo join(', ', array_map(
    function($t) { return ($t instanceof ReflectionIntersectionType) ? '<intersection>' : $t->getName(); },
    (new ReflectionMethod('C', 'f'))->getReturnType()->getTypes()
)) . "\n";
?>

Will display :
parent, PC, Traversable, <intersection>, self, C, static, callable, array, string, int, float, bool, null

Try it: https://onlinephp.io/c/777c6

down

baptiste at pillot dot fr ¶

1 year ago

ReflectionUnionType::getTypes can return an array of ReflectionNamedType and/or ReflectionIntersectionType objects only.

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