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SimpleXMLElement::children

(PHP 5, PHP 7, PHP 8)

SimpleXMLElement::children — Finds children of given node

Descrizione

public SimpleXMLElement::children(?string $namespaceOrPrefix = null, bool $isPrefix = false): ?SimpleXMLElement

This method finds the children of an element. The result follows normal iteration rules.

Nota: SimpleXML possiede regole per aggiungere proprietà iterative a diversi metodi. Queste non possono essere visualizzate con var_dump() o qualsiasi altra cosa che possa esaminare gli oggetti.

Elenco dei parametri

namespaceOrPrefix

An XML namespace.

isPrefix

If isPrefix is true, namespaceOrPrefix will be regarded as a prefix. If false, namespaceOrPrefix will be regarded as a namespace URL.

Valori restituiti

Returns a SimpleXMLElement element, whether the node has children or not, unless the node represents an attribute, in which case null is returned.

Esempi

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'];
}
}
}
?>

Il precedente esempio visualizzerà:

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)

Vedere anche: