ReflectionClass
PHP Manual

ReflectionClass::isIterable

Check whether this class is iterable

Description

public bool ReflectionClass::isIterable()

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

Parameters

This function has no parameters.

Return Values

Returns true if the class is iterable or false otherwise.

Examples

Example #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);
}
?>

The above example will output:

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

See Also

  • ReflectionClass::__construct