Php/docs/reflectionclass.isiterateable
ReflectionClass::isIterateable
(PHP 5, PHP 7)
ReflectionClass::isIterateable — 检查是否可迭代(iterateable)
说明
public ReflectionClass::isIterateable ( ) : bool
检查一个类是否可迭代(iterateable)。
参数
此函数没有参数。
返回值
成功时返回 true
, 或者在失败时返回 false
。
范例
Example #1 ReflectionClass::isIterateable() 例子
<?phpclass 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_iterateable($class) { $reflection = new ReflectionClass($class); var_dump($reflection->isIterateable());}$classes = array("ArrayObject", "IteratorClass", "DerivedClass", "NonIterator");foreach ($classes as $class) { echo "Is $class iterateable? "; dump_iterateable($class);}?>
以上例程会输出:
Is ArrayObject iterateable? bool(true) Is IteratorClass iterateable? bool(true) Is DerivedClass iterateable? bool(true) Is NonIterator iterateable? bool(false)