PHP中的生成XML文件的4种方法

<?xml version="1.0" encoding="utf-8"?>
<article>
    <item>
        <title size="1">title1</title>
        <content>content1</content>
        <pubdate>2009-10-11</pubdate>
    </item>
    <item>
        <title size="1">title2</title>
        <content>content2</content>
        <pubdate>2009-11-11</pubdate>
    </item>
</article>

<?PHP
$data_array = array(
    array(
    &#39;title&#39; => &#39;title1&#39;,
    &#39;content&#39; => &#39;content1&#39;,
        &#39;pubdate&#39; => &#39;2009-10-11&#39;,
    ),
    array(
    &#39;title&#39; => &#39;title2&#39;,
    &#39;content&#39; => &#39;content2&#39;,
    &#39;pubdate&#39; => &#39;2009-11-11&#39;,
    )
);
$title_size = 1;
 
$xml = "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n";
$xml .= "<article>\n";
 
foreach ($data_array as $data) {
$xml .= create_item($data[&#39;title&#39;], $title_size, $data[&#39;content&#39;], $data[&#39;pubdate&#39;]);
}
 
$xml .= "</article>\n";
 
echo $xml;
 
//  创建XML单项
function create_item($title_data, $title_size, $content_data, $pubdate_data)
{
    $item = "<item>\n";
    $item .= "<title size=\"" . $title_size . "\">" . $title_data . "</title>\n";
    $item .= "<content>" . $content_data . "</content>\n";
    $item .= " <pubdate>" . $pubdate_data . "</pubdate>\n";
    $item .= "</item>\n";
 
    return $item;
}
 
?>

<?PHP
$data_array = array(
    array(
    &#39;title&#39; => &#39;title1&#39;,
    &#39;content&#39; => &#39;content1&#39;,
        &#39;pubdate&#39; => &#39;2009-10-11&#39;,
    ),
    array(
    &#39;title&#39; => &#39;title2&#39;,
    &#39;content&#39; => &#39;content2&#39;,
    &#39;pubdate&#39; => &#39;2009-11-11&#39;,
    )
);
 
//  属性数组
$attribute_array = array(
    &#39;title&#39; => array(
    &#39;size&#39; => 1
    )
);
 
//  创建一个XML文档并设置XML版本和编码。。
$dom=new DomDocument(&#39;1.0&#39;, &#39;utf-8&#39;);
 
//  创建根节点
$article = $dom->createElement(&#39;article&#39;);
$dom->appendchild($article);
 
foreach ($data_array as $data) {
    $item = $dom->createElement(&#39;item&#39;);
    $article->appendchild($item);
 
    create_item($dom, $item, $data, $attribute_array);
}
 
echo $dom->saveXML();
 
function create_item($dom, $item, $data, $attribute) {
    if (is_array($data)) {
        foreach ($data as $key => $val) {
            //  创建元素
            $$key = $dom->createElement($key);
            $item->appendchild($$key);
 
            //  创建元素值
            $text = $dom->createTextNode($val);
            $$key->appendchild($text);
 
            if (isset($attribute[$key])) {
            //  如果此字段存在相关属性需要设置
                foreach ($attribute[$key] as $akey => $row) {
                    //  创建属性节点
                    $$akey = $dom->createAttribute($akey);
                    $$key->appendchild($$akey);
 
                    // 创建属性值节点
                    $aval = $dom->createTextNode($row);
                    $$akey->appendChild($aval);
                }
            }   //  end if
        }
    }   //  end if
}   //  end function
?>

<?PHP
$data_array = array(
    array(
    &#39;title&#39; => &#39;title1&#39;,
    &#39;content&#39; => &#39;content1&#39;,
        &#39;pubdate&#39; => &#39;2009-10-11&#39;,
    ),
    array(
    &#39;title&#39; => &#39;title2&#39;,
    &#39;content&#39; => &#39;content2&#39;,
    &#39;pubdate&#39; => &#39;2009-11-11&#39;,
    )
);
 
//  属性数组
$attribute_array = array(
    &#39;title&#39; => array(
    &#39;size&#39; => 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(&#39;  &#39;);
$xml->setIndent(true);
 
$xml->startDocument(&#39;1.0&#39;, &#39;utf-8&#39;);
//  开始创建文件
//  根结点
$xml->startElement(&#39;article&#39;);
 
foreach ($data_array as $data) {
    $xml->startElement(&#39;item&#39;);
 
    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();
 
$xml->flush();
?>

<?PHP
$data_array = array(
    array(
    &#39;title&#39; => &#39;title1&#39;,
    &#39;content&#39; => &#39;content1&#39;,
        &#39;pubdate&#39; => &#39;2009-10-11&#39;,
    ),
    array(
    &#39;title&#39; => &#39;title2&#39;,
    &#39;content&#39; => &#39;content2&#39;,
    &#39;pubdate&#39; => &#39;2009-11-11&#39;,
    )
);
 
//  属性数组
$attribute_array = array(
    &#39;title&#39; => array(
    &#39;size&#39; => 1
    )
);
 
$string = <<<XML
<?xml version=&#39;1.0&#39; encoding=&#39;utf-8&#39;?>
<article>
</article>
XML;
 
$xml = simplexml_load_string($string);
 
foreach ($data_array as $data) {
    $item = $xml->addChild(&#39;item&#39;);
    if (is_array($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();
?>