我正在使用simplexml_load_file()函数解析XML文件。当我遇到两个同名节点时，出现了问题。我的XML文件结构如下：
<company>
<name>Test Co</name>
<link href="link1" rel="self"/>
<link href="link2" rel="www"/>
</company>
以下是代码：
$parametrs = simplexml_load_file("my.xml");
foreach ($parametrs->company as $param ) {
echo $param->name;
}
我该如何从每个公司中输出link2？
<?php
$xml = '<?xml version="1.0" ?>
<company>
<name>Test Co</name>
<link href="link1" rel="self"/>
<link href="link2" rel="www"/>
</company>';
$parameters = new SimpleXmlElement($xml);
echo (string)$parameters->link[1]['href']; // note you must cast here!
这将输出“link2”（不带引号）。
此外，您可能需要事先检查这些元素是否存在，但由于超出了问题的范围，我将把它留给您处理；）
<company>。 - gen_Eric你可以使用 xPath：
<?php
$sxml = simplexml_load_string('<company>
<name>Test Co</name>
<link href="link1" rel="self"/>
<link href="link2" rel="www"/>
</company>');
$link = $sxml->xPath('//link[@rel="www"]');
var_dump($link);
http://codepad.viper-7.com/C4VU9q
问候
当您将XML文件加载到SimpleXML中时，返回的对象表示XML根节点，在您的情况下是<company>。
因此，您只需要简单地获取第二个链接标签，并获取其href即可。
$parametrs = simplexml_load_file("my.xml");
// you need to case here, as this is actually a SimpleXML element, not a string
echo (string)$parametrs->link[1]['href'];
<?php
class xml_grabber
{
private $xml_file = '' ;
private $xml_link = '' ;
private $xml_dom = '' ;
private $xml_type = '' ;
private $xml_content = '' ;
private $xml_errors = array() ;
public $xml_stack = 0 ;
public $only_text = 0 ;
private $xml_connect_count = 0 ;
public function __construct($link_file_com = '')
{
if(!$link_file_com)
{
$this->xml_errors['construct'] = 'No Xml In Construct' ;
return false;
}
elseif(!function_exists('simplexml_load_file') || !function_exists('simplexml_load_string') || !function_exists('simplexml_import_dom'))
{
$this->xml_errors['functions'] = 'simple xml function not exists' ;
return false;
}
else
{
$this->set_xml(trim($link_file_com)) ;
}
}
public function only_text( $val = 0 )
{
$this->only_text = $val ;
}
public function set_xml($xml)
{
if(isset($xml{3}))
{
if(file_exists($xml))
{
$this->xml_type = 1 ;
$this->xml_file = $xml ;
}
elseif(filter_var($xml, FILTER_VALIDATE_URL))
{
$this->xml_type = 2 ;
$this->xml_link = $xml ;
}
else
{
$this->xml_type = 3 ;
$this->xml_dom = $xml ;
}
}
else
{
$this->xml_type = '' ;
}
}
public function get_xml()
{
if($this->xml_type == '')
{
return false ;
}
elseif($this->xml_type == 1)
{
return $this->xml_file ;
}
elseif($this->xml_type == 2)
{
return $this->xml_link ;
}
elseif($this->xml_type == 3)
{
return $this->xml_dom ;
}
}
public function set_columns($new_columns= array())
{
return $this->xml_columns = $new_columns ;
}
public function get_columns()
{
return $this->xml_columns ;
}
public function load()
{
if($this->xml_type == '')
{
$this->xml_errors['loader'] = 'Unknown XML type' ;
return false;
}
elseif($this->xml_type == 1)
{
$xml = simplexml_load_file($this->xml_file,null, LIBXML_NOCDATA) ;
$this->xml_content = $xml ;
}
elseif($this->xml_type == 2)
{
$con = $this->connect($this->xml_link);
$this->xml_content = simplexml_load_string(trim($con),null, LIBXML_NOCDATA) ;
}
elseif($this->xml_type == 3)
{
return $this->xml_dom ;
}
}
public function fetch($return = 'array')
{
$xml = array() ;
if($this->xml_content)
{
print_r ( $this->get_attribute($this->xml_content)) ;
}
}
public function get_attribute($object)
{
if( (is_array( $object ) || is_object( $object )) && count( $object ) > 0 )
{
foreach( $object as $k => $val )
{
$count = count( $val ) ;
$cou = count( $object->$k ) ;
if( $count > 0 and is_array( $val ) || is_object( $val ) )
{
if( $cou > 1 )
{
$result['item'][] = $this->get_attribute( $val ) ;
}
else
{
$result[$k] = $this->get_attribute( $val ) ;
}
}
else
{
$attr = $val->attributes() ;
if( count( $attr ) > 0 )
{
$var ;
foreach( $attr as $kk => $vv )
{
$var[$kk] = (string) $vv ;
}
if( $cou > 1 )
{
$result[$k][] = $var ;
}
else
{
$result[$k] = $var ;
}
}
else
{
$result[$k] = (string) $val ;
}
}
}
}
else
{
$result[] = $object ;
}
return $result ;
}
/*
public function fetch($return = 'array')
{
if($this->xml_content)
{
$rss_feed = $this->xml_content ;
$rss_title = (string) $rss_feed->channel->title ;
$rss_link = (string) $rss_feed->channel->link ;
$rss_cat = (string) $rss_feed->channel->category ;
$rss_image = (string) $rss_feed->channel->image->url ;
$rss_summary =
array
(
'info' =>
array(
'title'=>$rss_title ,
'link'=>$rss_link ,
'cat'=>$rss_cat ,
'image'=>$rss_image
) ,
'item' => array()
) ;
if(is_array($rss_feed->channel) or is_object($rss_feed->channel))
{
if(is_array($rss_feed->channel->item) or is_object($rss_feed->channel->item))
{
foreach($rss_feed->channel->item as $item)
{
if($item->enclosure && $item->enclosure->attributes())
{
$image0 = $item->enclosure->attributes() ;
$image_url = $image0 ['url'] ;
}
$result = array() ;
foreach($item as $k=>$v)
{
$result[strtolower($k)] = strip_tags((string) $v) ;
}
if(isset($image_url{1}))
{
$result['image0'] = $image_url ;
}
$rss_summary['item'][] = $result ;
}
}
elseif(is_array($rss_feed->channel->entry) or is_object($rss_feed->channel->entry))
{
foreach($rss_feed->channel->entry as $item)
{
if($item->enclosure && $item->enclosure->attributes())
{
$image0 = $item->enclosure->attributes() ;
$image_url = $image0 ['url'] ;
}
$result = array() ;
foreach($item as $k=>$v)
{
$result[strtolower($k)] = (string) $v ;
}
if(isset($image_url{1}))
{
$result['image0'] = $image_url ;
}
$rss_summary['item'][] = $result ;
}
}
}
else
{
if(is_array($rss_feed->item) or is_object($rss_feed->item))
{
foreach($rss_feed->item as $item)
{
if($item->enclosure && $item->enclosure->attributes())
{
$image0 = $item->enclosure->attributes() ;
$image_url = $image0 ['url'] ;
}
$result = array() ;
foreach($item as $k=>$v)
{
$result[strtolower($k)] = (string) $v ;
}
if(isset($image_url{1}))
{
$result['image0'] = $image_url ;
}
$rss_summary['item'][] = $result ;
}
}
elseif(is_array($rss_feed->entry) or is_object($rss_feed->entry))
{
foreach($rss_feed->entry as $item)
{
if($item->enclosure && $item->enclosure->attributes())
{
$image0 = $item->enclosure->attributes() ;
$image_url = $image0 ['url'] ;
}
$result = array() ;
foreach($item as $k=>$v)
{
$result[strtolower($k)] = (string) $v ;
}
if(isset($image_url{1}))
{
$result['image0'] = $image_url ;
}
$rss_summary['item'][] = $result ;
}
}
}
if($return == 'json')
{
return json_encode($rss_summary) ;
}
elseif($return == 'serialize')
{
return serialize($rss_summary) ;
}
elseif($return == 'xml')
{
return xml_encode($rss_summary) ;
}
else
{
return $rss_summary ;
}
}
else
{
$this->xml_errors['fetch'] = 'No Xml Content' ;
}
}
*/
protected function connect($link,$post='')
{
if(!filter_var($link, FILTER_VALIDATE_URL))
{
$this->xml_errors['connect'] = 'Not Vaild Link To Get data' ;
return false ;
}
if(function_exists('curl_init'))
{
$cu = curl_init();
curl_setopt($cu,CURLOPT_URL,$link);
curl_setopt($cu,CURLOPT_AUTOREFERER,true);
if($post != '')
{
curl_setopt($cu,CURLOPT_HEADER, 1);
curl_setopt($cu,CURLOPT_POST,3);
curl_setopt($cu,CURLOPT_POSTFIELDS,$post);
}
curl_setopt($cu,CURLOPT_USERAGENT,$_SERVER['HTTP_USER_AGENT']);
curl_setopt($cu,CURLOPT_SSL_VERIFYPEER,false);
curl_setopt($cu,CURLOPT_SSL_VERIFYHOST,false);
curl_setopt($cu,CURLOPT_RETURNTRANSFER,true);
$co = curl_exec($cu) ;
if($co)
{
$con = $co ;
}
else
{
$this->xml_errors['connect'] = 'No Result From Curl' ;
$this->xml_errors['curl'] = curl_error($cu);
}
curl_close($cu) ;
}
if(!$con and function_exists('ini_get'))
{
$url_fopen = ini_get('allow_url_fopen') ;
if($url_fopen == 0)
{
if(function_exists('ini_set'))
{
ini_set('allow_url_fopen', 1) ;
}
$check_fopen = 1 ;
}
else
{
$check_fopen = 0 ;
}
if($check_fopen == 1)
{
$url_fopen = ini_get('allow_url_fopen') ;
}
if($url_fopen == 1)
{
if(function_exists('file_get_contents') and !$con)
{
$con = @file_get_contents($link) ;
if($con)
{
$con ;
}
else
{
$this->xml_errors['connect'] = 'No Result From file_get_contents' ;
}
}
elseif(function_exists('readfile') and !$con)
{
$con = @readfile($link);
if($con)
{
$con ;
}
else
{
$this->xml_errors['connect'] = 'No Result From readfile' ;
}
}
elseif(function_exists('file') and !$con)
{
$con = @file($link) ;
if($con)
{
$con ;
}
else
{
$this->xml_errors['connect'] = 'No Result From file' ;
}
}
}
}
if(!$con)
{
$this->xml_errors['connect'] = 'Curl And Allow Url Fopen Disabled On Server' ;
return false ;
}
elseif(stripos($con,'DDoS protection by CloudFlare') and $this->xml_connect_count < 1)
{
echo '<h2> Curl Answer No : '.$this->xml_connect_count.' </h2>'.$con.'<br />';
preg_match('/'.preg_quote('.val(').'(.*?)'.preg_quote(');').'/is', $con, $match);
$matc = str_replace('+', " + ", $match[1]) ;
$matc = str_replace('*', " * ", $matc) ;
$post = eval ("return $matc ;") ;
$html=new DOMDocument();
$html->loadHTML($con) ;
$xpath = new DOMXPath($html);
$tags = $xpath->query('//input[@type="hidden"]');
$fields = array();
foreach ($tags as $tag) {
$fields[trim($tag->getAttribute('name'))] = trim($tag->getAttribute('value')) ;
}
$post_data = 'act=jschl&jschl_vc='.$fields['jschl_vc'].'&jschl_answer='.$post ;
echo '<h2> I will post this info to curl </h2>'.$post_data.'<br /> ' ;
$this->xml_connect_count = $this->xml_connect_count + 1 ;
sleep(5) ;
$con = $this->connect($link , $post_data) ;
echo '<h2> Curl Answer No : 1 </h2>'. $con.'<br />' ;
preg_match('/^Set-Cookie: (.*?);/m', $con, $m);
echo '<h2> Cookie from Result </h2>' ;var_dump(parse_url($m[1]));
}
else
{
return $con ;
}
}
public function get_error()
{
return $this->xml_errors ;
}
}
?>
使用方法如下：
<?php
$rss = new xml_grabber('xml.xml') ;
$rss -> load() ;
$x = $rss -> fetch() ;
print_r ( $x ) ;
?>
例子
<?xml version="1.0" encoding="Windows-1256"?>
<rss version="2.0">
<channel>
<info name="xml_reader" vesrion="1.0" author="sec.php"></info>
<title> Xml By sec.php </title>
<company>
<name>Test Co</name>
<link href="link1" rel="self"/>
<link href="link2" rel="www"/>
</company>
<company>
<name>Test Co</name>
<link href="link1" rel="self"/>
<link href="link2" rel="www"/>
</company>
<company>
<name>Test Co</name>
<link href="link1" rel="self"/>
<link href="link2" rel="www"/>
</company>
</channel>
</rss>
结果 数组 ( [频道] => 数组 ( [信息] => 数组 ( [名称] => xml_reader [版本] => 1.0 [作者] => sec.php )
[title] => Xml By sec.php
[item] => Array
(
[0] => Array
(
[name] => Test Co
[link] => Array
(
[0] => Array
(
[href] => link1
[rel] => self
)
[1] => Array
(
[href] => link2
[rel] => www
)
)
)
[1] => Array
(
[name] => Test Co
[link] => Array
(
[0] => Array
(
[href] => link1
[rel] => self
)
[1] => Array
(
[href] => link2
[rel] => www
)
)
)
[2] => Array
(
[name] => Test Co
[link] => Array
(
[0] => Array
(
[href] => link1
[rel] => self
)
[1] => Array
(
[href] => link2
[rel] => www
)
)
)
)
)
)