ReflectionClass::isIterateable()

(PHP 5, PHP 7)

检查是否可迭代（iterateable）

说明

publicReflectionClass::isIterateable(void): 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 #1ReflectionClass::isIterateable()例子

<?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_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)

参见

• ReflectionClass::__construct() 初始化 ReflectionClass 类