ArrayObject::getIterator

(PHP 5, PHP 7, PHP 8)

ArrayObject::getIterator — Create a new iterator from an ArrayObject instance

说明

public function ArrayObject::getIterator(): Iterator

Create a new Iterator (default is ArrayIterator ) from an ArrayObject instance.

参数

此函数没有参数。

返回值

An iterator from an ArrayObject .

示例

示例 #1 ArrayObject::getIterator() example

<?php
$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();
}
?>

以上示例会输出:

1 => one
2 => two
3 => three

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doug at centraldesktop ¶

12 years ago

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