RecursiveIteratorIterator::__construct
(PHP 5 >= 5.1.3, PHP 7)
RecursiveIteratorIterator::__construct — Construct a RecursiveIteratorIterator
Description
public RecursiveIteratorIterator::__construct ( Traversable $iterator [, int $mode = RecursiveIteratorIterator::LEAVES_ONLY [, int $flags = 0 ]] )Creates a RecursiveIteratorIterator from a RecursiveIterator.
Parameters
iterator
The iterator being constructed from. Either a RecursiveIterator or IteratorAggregate.
mode
Optional mode. Possible values are
RecursiveIteratorIterator::LEAVES_ONLY- The default. Lists only leaves in iteration.
RecursiveIteratorIterator::SELF_FIRST- Lists leaves and parents in iteration with parents coming first.
RecursiveIteratorIterator::CHILD_FIRST- Lists leaves and parents in iteration with leaves coming first.
flags
Optional flag. Possible values are RecursiveIteratorIterator::CATCH_GET_CHILD which will then ignore exceptions thrown in calls to RecursiveIteratorIterator::getChildren().
Return Values
No value is returned.
Examples
Example #1 Iterating a RecursiveIteratorIterator
<?php
$array?=?array(
????array(
????????array(
????????????array(
????????????????'leaf-0-0-0-0',
????????????????'leaf-0-0-0-1'
????????????),
????????????'leaf-0-0-0'
????????),
????????array(
????????????array(
????????????????'leaf-0-1-0-0',
????????????????'leaf-0-1-0-1'
????????????),
????????????'leaf-0-1-0'
????????),
????????'leaf-0-0'
????)
);
$iterator?=?new?RecursiveIteratorIterator(
????new?RecursiveArrayIterator($array),
????$mode
);
foreach?($iterator?as?$key?=>?$leaf)?{
????echo?"$key?=>?$leaf",?PHP_EOL;
}
?>Output with $mode = RecursiveIteratorIterator::LEAVES_ONLY
0 => leaf-0-0-0-0
1 => leaf-0-0-0-1
0 => leaf-0-0-0
0 => leaf-0-1-0-0
1 => leaf-0-1-0-1
0 => leaf-0-1-0
0 => leaf-0-0Output with $mode = RecursiveIteratorIterator::SELF_FIRST
0 => Array
0 => Array
0 => Array
0 => leaf-0-0-0-0
1 => leaf-0-0-0-1
1 => leaf-0-0-0
1 => Array
0 => Array
0 => leaf-0-1-0-0
1 => leaf-0-1-0-1
1 => leaf-0-1-0
2 => leaf-0-0Output with $mode = RecursiveIteratorIterator::CHILD_FIRST
0 => leaf-0-0-0-0
1 => leaf-0-0-0-1
0 => Array
1 => leaf-0-0-0
0 => Array
0 => leaf-0-1-0-0
1 => leaf-0-1-0-1
0 => Array
1 => leaf-0-1-0
1 => Array
2 => leaf-0-0
0 => Array← RecursiveIteratorIterator::callHasChildren
RecursiveIteratorIterator::current →
? 1997–2017 The PHP Documentation GroupLicensed under the Creative Commons Attribution License v3.0 or later.
本文档系腾讯云开发者社区成员共同维护，如有问题请联系 cloudcommunity@tencent.com
