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    DOMNode::hasChildNodes

    (PHP 5, PHP 7, PHP 8)

    DOMNode::hasChildNodes — ノードが子を保持しているかどうかを調べる

    説明

    public DOMNode::hasChildNodes(): bool

    この関数は、ノードが子を保持しているかどうかを調べます。

    パラメータ

    この関数にはパラメータはありません。

    戻り値

    成功した場合に true を、失敗した場合に false を返します。

    参考

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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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