RecursiveArrayIterator::getChildren()

(PHP 5 >= 5.1.0, PHP 7)

Returns an iterator for the current entry if it is an array or an object

说明

publicRecursiveArrayIterator::getChildren( void) :RecursiveArrayIterator

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.

错误／异常

An InvalidArgumentException will be thrown if the current entry does not contain an array or an object.

范例

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

参见

• RecursiveArrayIterator::hasChildren() Returns whether current entry is an array or an object

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"
 }
}