update : 2015.11.03
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Counts the children of an element
SimpleXMLElement
PHP Manual

SimpleXMLElement::count

(PHP 5 >= 5.3.0)

SimpleXMLElement::count — Counts the children of an element

설명

public int SimpleXMLElement::count ( void )

This method counts the number of children of an element.

반환값

Returns the number of elements of an element.

예제

Example #1 Counting the number of children

<?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());
}
?>

위 예제의 출력:

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

참고

SimpleXMLElement
PHP Manual