(PHP 5, PHP 7, PHP 8)
SimpleXMLElement::children — Finds children of given node
$namespaceOrPrefix = null, bool $isPrefix = false): ?SimpleXMLElementThis method finds the children of an element. The result follows normal iteration rules.
注意: SimpleXML 建起了一个给大多数方法添加迭代属性的规则。不能通过使用 var_dump() 或任何可检查对象的其它东西来查看。
namespaceOrPrefixAn XML namespace.
isPrefix
If isPrefix is true,
namespaceOrPrefix will be regarded as a prefix. If false,
namespaceOrPrefix will be regarded as a namespace
URL.
Returns a SimpleXMLElement element, whether the node
has children or not, unless the node represents an attribute, in which case
null is returned.
示例 #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'];
}
}
}
?>
以上例程会输出：
The person begot a son who begot a daughter; The person begot a daughter who begot a son; and that son begot a son
示例 #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)