使用simple_xml统计XML子节点中出现的次数

$xml = '<root>
            <item>Apple</item>
            <item>Orange</item>
            <item>Apple</item>
            <item>Banana</item>
            <item>Apple</item>
        </root>';

// 加载XML数据到simplexml对象
$simplexml = simplexml_load_string($xml);

// 统计子节点出现次数的数组
$counts = array();

// 遍历XML子节点
foreach ($simplexml->item as $item) {
    $nodeName = $item->__toString();
    
    // 统计子节点出现次数
    if (isset($counts[$nodeName])) {
        $counts[$nodeName]++;
    } else {
        $counts[$nodeName] = 1;
    }
}

// 输出统计结果
foreach ($counts as $nodeName => $count) {
    echo "节点 '$nodeName' 出现了 $count 次\n";
}