DOMNode::hasChildNodes

(PHP 5, PHP 7, PHP 8)

DOMNode::hasChildNodes — Vérifie si le nœud possède des enfants

Description

public DOMNode::hasChildNodes(): bool

Cette fonction vérifie si un nœud possède des enfants.

Liste de paramètres

Cette fonction ne contient aucun paramètre.

Valeurs de retour

Cette fonction retourne true en cas de succès ou false si une erreur survient.

Voir aussi

DOMImplementation::hasFeature() - Teste si l'implémentation DOM implémente une fonctionnalité spécifique

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User Contributed Notes 4 notes

down

sansana ¶

14 years ago

Personally I think using a simple:[code]if($DOMNode->childNodes <>0){}[/code] works better.

down

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

down

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

down

-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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