ReflectionClass::isIterable

(PHP 7 >= 7.2.0, PHP 8)

ReflectionClass::isIterable — Check whether this class is iterable

Beschreibung

public function ReflectionClass::isIterable(): bool

Check whether this class is iterable (i.e. can be used inside foreach).

Parameter-Liste

Diese Funktion besitzt keine Parameter.

Rückgabewerte

Returns true if the class is iterable or false otherwise.

Beispiele

Beispiel #1 Basic ReflectionClass::isIterable() Usage

<?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);
}
?>

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

Is ArrayObject iterable? bool(true)
Is IteratorClass iterable? bool(true)
Is DerivedClass iterable? bool(true)
Is NonIterator iterable? bool(false)

Siehe auch