(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).
Această funcție nu are parametri.
Întoarce valoarea TRUE în cazul
succesului sau FALSE în cazul eșecului.
Example #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);
}
?>
Exemplul de mai sus va afișa:
Is ArrayObject iterable? bool(true) Is IteratorClass iterable? bool(true) Is DerivedClass iterable? bool(true) Is NonIterator iterable? bool(false)