DOMNode
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DOMNode::hasChildNodes

(PHP 5)

DOMNode::hasChildNodes — Checks if node has children

说明

public bool DOMNode::hasChildNodes ( void )

This function checks if the node has children.

返回值

成功时返回 TRUE， 或者在失败时返回 FALSE.

参见

DOMNode
在线手册：中文 英文
PHP手册
PHP手册 - N: Checks if node has children

用户评论:

sansana (15-Oct-2010 03:04)

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

syngcw at syncgw.com (04-Jan-2010 01:53)

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

jintoppy at gmail dot com (28-Apr-2009 12:13)

<?php

$doc = new DOMDocument;
$node = $doc->createElement("FirstMain", "First Main Node. This have child");
$doc->appendChild($node);
$childnode = $doc->createElement("childnode", "child node");
$node->appendChild($childnode);
$secondnode = $doc->createElement("SecondMain", "First Main Node. This don't have child");
$doc->appendChild($secondnode);
$doc->saveXML();
$nodeElmt = $doc->getElementsByTagName("FirstMain");
/*
if given as $nodeElmt = $doc->getElementsByTagName("childnode");
the output would be "This node has childnodes"

if given as $nodeElmt = $doc->getElementsByTagName("SecondMain");
the output would be "This node has no childnodes"

*/

foreach($nodeElmt as $nodeElmt)
{
if($nodeElmt->hasChildNodes())
{
echo "This node has childnodes";
}
else
{
echo "This node has no childnodes";
}
}

  ?>

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Output:

This node has childnodes

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