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();  
?>