ArrayObject::getIterator()
(PHP 5, PHP 7)
Create a new iterator from an ArrayObject instance
说明
public ArrayObject::getIterator(void): ArrayIterator
Create a new iterator from an ArrayObject instance.
参数
此函数没有参数。
返回值
An iterator from an ArrayObject.
范例
ArrayObject::getIterator() example
<?php $array = array('1' => 'one', '2' => 'two', '3' => 'three'); $arrayobject = new ArrayObject($array); $iterator = $arrayobject->getIterator(); while($iterator->valid()) { echo $iterator->key() . ' => ' . $iterator->current() . "\n"; $iterator->next(); } ?>
以上例程会输出:
1 => one 2 => two 3 => three
ArrayObject iterator class requires a child of ArrayObject or ArrayIterator <?php class MyIterator implements Iterator { public function __construct(ArrayObject $array, $flags = 0) { // ... } public function current() { // .. } public function next() { // .. } public function key() { // .. } public function valid() { // .. } public function rewind() { // .. } } $obj = new ArrayObject(array(), 0, 'MyIterator'); $obj->getIterator(); ?> PHP Fatal error: ArrayObject::getIterator(): Internal compiler error, Class is not child of ArrayObject or ArrayIterator in php shell code on line 1