(PHP 5, PHP 7)
SimpleXMLElement::children — Finds children of given node
This method finds the children of an element. The result follows normal iteration rules.
Note: SimpleXML ������һ���������������ӵ������ԵĹ�����ͨ��ʹ�� var_dump() ���κοɼ�����������������鿴��
nsAn XML namespace.
is_prefix
If is_prefix is TRUE,
ns will be regarded as a prefix. If FALSE,
ns will be regarded as a namespace
URL.
Returns a SimpleXMLElement element, whether the node has children or not.
| �汾 | ˵�� |
|---|---|
| 5.2.0 |
The optional parameter is_prefix was added.
|
Example #1 Traversing a children() pseudo-array
<?php
$xml = new SimpleXMLElement(
'<person>
<child role="son">
<child role="daughter"/>
</child>
<child role="daughter">
<child role="son">
<child role="son"/>
</child>
</child>
</person>');
foreach ($xml->children() as $second_gen) {
echo ' The person begot a ' . $second_gen['role'];
foreach ($second_gen->children() as $third_gen) {
echo ' who begot a ' . $third_gen['role'] . ';';
foreach ($third_gen->children() as $fourth_gen) {
echo ' and that ' . $third_gen['role'] .
' begot a ' . $fourth_gen['role'];
}
}
}
?>
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The person begot a son who begot a daughter; The person begot a daughter who begot a son; and that son begot a son
Example #2 Using namespaces
<?php
$xml = '<example xmlns:foo="my.foo.urn">
<foo:a>Apple</foo:a>
<foo:b>Banana</foo:b>
<c>Cherry</c>
</example>';
$sxe = new SimpleXMLElement($xml);
$kids = $sxe->children('foo');
var_dump(count($kids));
$kids = $sxe->children('foo', TRUE);
var_dump(count($kids));
$kids = $sxe->children('my.foo.urn');
var_dump(count($kids));
$kids = $sxe->children('my.foo.urn', TRUE);
var_dump(count($kids));
$kids = $sxe->children();
var_dump(count($kids));
?>
int(0) int(2) int(2) int(0) int(1)
SimpleXMLElement::children() returns a node object no matter if the current node has children or not. Use count() on the return value to see if there are any children. As of PHP 5.3.0, SimpleXMLElement::count() may be used instead.