(PHP 7 >= 7.2.0, PHP 8)
ReflectionClass::isIterable — このクラスがイテレーション可能かを調べる
この関数にはパラメータはありません。
例1 基本的な ReflectionClass::isIterable() の例
<?php
class IteratorClass implements Iterator
{
public function __construct() {}
public function key(): mixed {}
public function current(): mixed {}
public function next(): void {}
public function valid(): bool {}
public function rewind(): void {}
}
class DerivedClass extends IteratorClass {}
class NonIterator {}
function dump_iterable($class)
{
$reflection = new ReflectionClass($class);
var_dump($reflection->isIterable());
}
$classes = ["ArrayObject", "IteratorClass", "DerivedClass", "NonIterator",];
foreach ($classes as $class) {
echo "Is $class iterable? ";
dump_iterable($class);
}
?>上の例の出力は以下となります。
Is ArrayObject iterable? bool(true) Is IteratorClass iterable? bool(true) Is DerivedClass iterable? bool(true) Is NonIterator iterable? bool(false)