php生成xml文件的四种方法

<?PHP
$data_array = array(
    array(
    'title' => 'title1',
    'content' => 'content1',
        'pubdate' => '2009-10-11',
    ),
    array(
    'title' => 'title2',
    'content' => 'content2',
    'pubdate' => '2009-11-11',
    )
);

//  属性数组
$attribute_array = array(
    'title' => array(
    'size' => 1
    )
);

$xml = new XMLWriter();
$xml->openUri("php://output");
//  输出方式，也可以设置为某个xml文件地址，直接输出成文件
$xml->setIndentString('  ');
$xml->setIndent(true);

$xml->startDocument('1.0', 'utf-8');
//  开始创建文件
//  根结点
$xml->startElement('article');

foreach ($data_array as $data) {
    $xml->startElement('item');
    if (is_array($data)) {
        foreach ($data as $key => $row) {
          $xml->startElement($key);
          if (isset($attribute_array[$key]) && is_array($attribute_array[$key]))
          {
              foreach ($attribute_array[$key] as $akey => $aval) {
              //  设置属性值
                    $xml->writeAttribute($akey, $aval);
                }
            }
            $xml->text($row);   //  设置内容
            $xml->endElement(); // $key
        }
    }
    $xml->endElement(); //  item
}

$xml->endElement(); //  article
$xml->endDocument(); //edit www.jb200.com

$xml->flush();
?>

<?PHP
$data_array = array(
    array(
    'title' => 'title1',
    'content' => 'content1',
        'pubdate' => '2009-10-11',
    ),
    array(
    'title' => 'title2',
    'content' => 'content2',
    'pubdate' => '2009-11-11',
    )
);

//  属性数组
$attribute_array = array(
    'title' => array(
    'size' => 1
    )
);

$string = <<<XML
<?xml version='1.0' encoding='utf-8'?>
<article>
</article>
XML;

$xml = simplexml_load_string($string);

foreach ($data_array as $data) {
    $item = $xml->addChild('item');
    if (is_array($data)) {
        foreach ($data as $key => $row) {
          $node = $item->addChild($key, $row);

          if (isset($attribute_array[$key]) && is_array($attribute_array[$key]))
            {
              foreach ($attribute_array[$key] as $akey => $aval) {
             //  设置属性值
                  $node->addAttribute($akey, $aval);
            }
          }
        }
    }
}
echo $xml->asXML();
?>