(PHP 5 >= 5.3.0, PHP 7)
SimpleXMLElement::count — Counts the children of an element
This method counts the number of children of an element.
Returns the number of elements of an element.
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());
}
?>
以上例程会输出：
Person 1 has got 3 children. Person 2 has got 5 children.