RecursiveArrayIterator::getChildren
(PHP 5 >= 5.1.0, PHP 7, PHP 8)
RecursiveArrayIterator::getChildren — Returns an iterator for the current entry if it is an array or an object
说明
Returns an iterator for the current iterator entry.
参数
此函数没有参数。
返回值
An iterator for the current entry, if it is an array or object; or null on failure.
错误／异常
An InvalidArgumentException will be thrown if the current entry does not contain an array or an object.
范例
示例 #1 RecursiveArrayIterator::getChildren() example
<?php
$fruits = array("a" => "lemon", "b" => "orange", array("a" => "apple", "p" => "pear"));
$iterator = new RecursiveArrayIterator($fruits);
while ($iterator->valid()) {
if ($iterator->hasChildren()) {
// print all children
foreach ($iterator->getChildren() as $key => $value) {
echo $key . ' : ' . $value . "\n";
}
} else {
echo "No children.\n";
}
$iterator->next();
}
?>
以上例程会输出：
No children. No children. a : apple p : pear
add a note
User Contributed Notes 1 note
814ckf0x ¶
8 years ago
RecursiveArrayIterator::getChildrens returns a copy of the children, not a reference:
<?php
$stack = array ("some" => "value",
array ("subsome" => "subvalue", array ("subsubsome" => "subsubvalue")),
"some1" => "value1");
$object = new RecursiveArrayIterator ($stack);
$object->next ();
$second_object = &$object->getChildren ();
$second_object->next ();
$third_object = &$second_object->getChildren ();
$third_object->offsetSet ("subsubsome", "subsubdiferent");
var_dump ($object);
var_dump ($second_object);
var_dump ($third_object);
?>
returns:
object(RecursiveArrayIterator)#1 (1) {
["storage":"ArrayIterator":private]=>
array(3) {
["some"]=>
string(5) "value"
[0]=>
array(2) {
["subsome"]=>
string(8) "subvalue"
[0]=>
array(1) {
["subsubsome"]=>
string(11) "subsubvalue" <--- expected to be changed
}
}
["some1"]=>
string(6) "value1"
}
}
object(RecursiveArrayIterator)#2 (1) {
["storage":"ArrayIterator":private]=>
array(2) {
["subsome"]=>
string(8) "subvalue"
[0]=>
array(1) {
["subsubsome"]=>
string(11) "subsubvalue" <--- expected to be changed
}
}
}
object(RecursiveArrayIterator)#3 (1) {
["storage":"ArrayIterator":private]=>
array(1) {
["subsubsome"]=>
string(14) "subsubdiferent"
}
}
备份地址：http://www.lvesu.com/blog/php/recursivearrayiterator.getchildren.php