(PHP 7 >= 7.2.0)
ReflectionClass::isIterable — Check whether this class is iterable
Check whether this class is iterable (i.e. can be used inside foreach).
Esta função não possui parâmetros.
Retorna TRUE em caso de sucesso ou FALSE em caso de falha.
Exemplo #1 Basic ReflectionClass::isIterable() Usage
<?php
class IteratorClass implements Iterator {
public function __construct() { }
public function key() { }
public function current() { }
function next() { }
function valid() { }
function rewind() { }
}
class DerivedClass extends IteratorClass { }
class NonIterator { }
function dump_iterable($class) {
$reflection = new ReflectionClass($class);
var_dump($reflection->isIterable());
}
$classes = array("ArrayObject", "IteratorClass", "DerivedClass", "NonIterator");
foreach ($classes as $class) {
echo "Is $class iterable? ";
dump_iterable($class);
}
?>
O exemplo acima irá imprimir:
Is ArrayObject iterable? bool(true) Is IteratorClass iterable? bool(true) Is DerivedClass iterable? bool(true) Is NonIterator iterable? bool(false)