[edit] Last updated: Fri, 25 May 2012

SimpleXMLElement::count

(PHP 5 >= 5.3.0)

SimpleXMLElement::count — 子要素を数える

説明

public int SimpleXMLElement::count ( void )

このメソッドは、子要素を数えます。

返り値

子要素の数を返します。

例

例1 子要素の数の取得


<?php
$xml = <<<EOF
<people>
 <person name="Person 1">
  <child/>
  <child/>
  <child/>
 </person>
 <person name="Person 2">
  <child/>
  <child/>
  <child/>
  <child/>
  <child/>
 </person>
</people>
EOF;

$elem = new SimpleXMLElement($xml);

foreach ($elem as $person) {
    printf("%s has got %d children.\n", $person['name'], $person->count());
}
?>

上の例の出力は以下となります。

Person 1 has got 3 children.
Person 2 has got 5 children.

参考

SimpleXMLElement::children() - 指定したノードの子ノードを見付ける

add a note User Contributed Notes SimpleXMLElement::count

daniel dot erni at focusedpublishing dot com 22-Mar-2011 05:37


Alternative code for PHP < 5.3:

<?php

$count = $node->count(); // PHP > 5.3

$count = count($node->children()); // PHP < 5.3

?>

Jimmy New Tron 16-Jun-2010 05:17


I used the DOMNodeList $length property to simulate this function since my host had not yet implemented PHP 5.3.  The following code makes it portable and allows you to prepare for an upgrade path.





<?php


$url = "http://www.example.com/foo.xml";


$xml = simplexml_load_file($url);


// For debugging


// echo "<p>".phpversion()."</p>";


if(phpversion() >= '5.3.0'){


    $bar_count = $xml->foo->bar->count();


    }


else    {


    $doc = new DOMDocument();


    $str = $xml->asXML();


    $doc->loadXML($str);


    $bar_count = $doc->getElementsByTagName("bar")->length;


    }


echo "There are ".$bar_count." \"bar\" nodes in this document.<br />";


?>

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