PHP Conference Japan 2024

DOMNode::hasChildNodes

(PHP 5, PHP 7, PHP 8)

DOMNode::hasChildNodes Checks if node has children

Description

public DOMNode::hasChildNodes(): bool

This function checks if the node has children.

Parameters

This function has no parameters.

Return Values

Returns true on success or false on failure.

See Also

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User Contributed Notes 4 notes

up
6
sansana
14 years ago
Personally I think using a simple:[code]if($DOMNode->childNodes <>0){}[/code] works better.
up
6
syngcw at syncgw.com
14 years ago
This function is a bit tricky. If you want to find XML childnodes it is useless. You need to create a work-around:

<?php

$x
= new DOMDocument();
$x->loadXML('
<A>
<B>b-text</B>
<C>
<D>d-text</D>
</C>
<E/>
</A>'
);

shownode($x->getElementsByTagName('A')->item(0));
function
shownode($x) {
foreach (
$x->childNodes as $p)
if (
hasChild($p)) {
echo
$p->nodeName.' -> CHILDNODES<br>';
shownode($p);
} elseif (
$p->nodeType == XML_ELEMENT_NODE)
echo
$p->nodeName.' '.$p->nodeValue.'<br>';
}
function
hasChild($p) {
if (
$p->hasChildNodes()) {
foreach (
$p->childNodes as $c) {
if (
$c->nodeType == XML_ELEMENT_NODE)
return
true;
}
}
return
false;
}

?>

shows:
B b-text
C -> CHILDNODES
D d-text
E
up
4
richard dot gildx at gmail dot com
12 years ago
This "hasChildNodes()" exercise is simple enough to make it clear and understandable. Or, you could take it as a tag empty check. By Richard Holm, Sweden.

<?php
$xmldoc
=
'<?xml version="1.0" ?>
<root>
<text>Text</text>
<none/>
<empty></empty>
<space> </space>
</root>'
;

$domdoc=new DOMDocument();
$domdoc->loadXML($xmldoc);

$tag=$domdoc->getElementsByTagName('root')->item(0);
$v=$tag->hasChildNodes()?" hasChildNodes":" hasNoChildNodes";
echo
$tag->tagName.$v."<br/>";

$tag=$domdoc->getElementsByTagName('text')->item(0);
$v=$tag->hasChildNodes()?" hasChildNodes":" hasNoChildNodes";
echo
$tag->tagName.$v."<br/>";

$tag=$domdoc->getElementsByTagName('none')->item(0);
$v=$tag->hasChildNodes()?" hasChildNodes":" hasNoChildNodes";
echo
$tag->tagName.$v."<br/>";

$tag=$domdoc->getElementsByTagName('empty')->item(0);
$v=$tag->hasChildNodes()?" hasChildNodes":" hasNoChildNodes";
echo
$tag->tagName.$v."<br/>";

$tag=$domdoc->getElementsByTagName('space')->item(0);
$v=$tag->hasChildNodes()?" hasChildNodes":" hasNoChildNodes";
echo
$tag->tagName.$v."<br/>";
?>

Output:
root hasChildNodes
text hasChildNodes
none hasNoChildNodes
empty hasNoChildNodes
space hasChildNodes
up
-5
Anonymous
9 years ago
Hi what if its a dynamic file and we cannot use get elements by tag name then how do we print the contents of all level tags?
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